storage – Storage management

The storage provides storage management functionality such as mounting and unmounting which is typically handled by the operating system hosting Python. CircuitPython does not have an OS, so this module provides this functionality directly.

For more information regarding using the storage module, refer to the CircuitPython Essentials Learn guide.

Available on these boards
  • 01Space 0.42 OLED ESP32C3
  • 0xCB Helios
  • 42. Keebs Frood
  • 8086 Commander
  • 8086 USB Interposer
  • @sarfata shIRtty
  • AITHinker ESP32-C3S_Kit
  • AITHinker ESP32-C3S_Kit_2M
  • ARAMCON Badge 2019
  • ARAMCON2 Badge
  • ATMegaZero ESP32-S2
  • Adafruit BLM Badge
  • Adafruit CLUE nRF52840 Express
  • Adafruit Camera
  • Adafruit Circuit Playground Bluefruit
  • Adafruit Circuit Playground Express 4-H
  • Adafruit CircuitPlayground Express
  • Adafruit CircuitPlayground Express with Crickit libraries
  • Adafruit CircuitPlayground Express with displayio
  • Adafruit EdgeBadge
  • Adafruit Feather Bluefruit Sense
  • Adafruit Feather ESP32 V2
  • Adafruit Feather ESP32-C6 4MB Flash No PSRAM
  • Adafruit Feather ESP32-S2 Reverse TFT
  • Adafruit Feather ESP32-S2 TFT
  • Adafruit Feather ESP32-S3 Reverse TFT
  • Adafruit Feather ESP32-S3 TFT
  • Adafruit Feather ESP32S2
  • Adafruit Feather ESP32S3 4MB Flash 2MB PSRAM
  • Adafruit Feather ESP32S3 No PSRAM
  • Adafruit Feather HUZZAH32
  • Adafruit Feather M0 Adalogger
  • Adafruit Feather M0 Basic
  • Adafruit Feather M0 Express
  • Adafruit Feather M0 Express with Crickit libraries
  • Adafruit Feather M0 RFM69
  • Adafruit Feather M0 RFM9x
  • Adafruit Feather M4 CAN
  • Adafruit Feather M4 Express
  • Adafruit Feather MIMXRT1011
  • Adafruit Feather RP2040
  • Adafruit Feather RP2040 Adalogger
  • Adafruit Feather RP2040 CAN
  • Adafruit Feather RP2040 DVI
  • Adafruit Feather RP2040 Prop-Maker
  • Adafruit Feather RP2040 RFM
  • Adafruit Feather RP2040 Scorpio
  • Adafruit Feather RP2040 ThinkInk
  • Adafruit Feather RP2040 USB Host
  • Adafruit Feather RP2350
  • Adafruit Feather STM32F405 Express
  • Adafruit Feather nRF52840 Express
  • Adafruit Floppsy RP2040
  • Adafruit FunHouse
  • Adafruit Gemma M0
  • Adafruit Gemma M0 PyCon 2018
  • Adafruit Grand Central M4 Express
  • Adafruit HUZZAH32 Breakout
  • Adafruit Hallowing M4 Express
  • Adafruit ItsyBitsy ESP32
  • Adafruit ItsyBitsy M0 Express
  • Adafruit ItsyBitsy M4 Express
  • Adafruit ItsyBitsy RP2040
  • Adafruit ItsyBitsy nRF52840 Express
  • Adafruit KB2040
  • Adafruit LED Glasses Driver nRF52840
  • Adafruit Macropad RP2040
  • Adafruit MagTag
  • Adafruit Matrix Portal M4
  • Adafruit MatrixPortal S3
  • Adafruit Metro ESP32S2
  • Adafruit Metro ESP32S3
  • Adafruit Metro M0 Express
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  • Adafruit Metro RP2040
  • Adafruit Metro RP2350
  • Adafruit Metro nRF52840 Express
  • Adafruit Monster M4SK
  • Adafruit NeoKey Trinkey M0
  • Adafruit NeoPixel Trinkey M0
  • Adafruit Pixel Trinkey M0
  • Adafruit ProxLight Trinkey M0
  • Adafruit PyGamer
  • Adafruit PyPortal
  • Adafruit PyPortal Pynt
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  • Adafruit Pybadge
  • Adafruit QT Py ESP32 PICO
  • Adafruit QT Py ESP32-S3 4MB Flash 2MB PSRAM
  • Adafruit QT Py ESP32-S3 no psram
  • Adafruit QT Py ESP32C3
  • Adafruit QT Py ESP32S2
  • Adafruit QT Py M0
  • Adafruit QT Py M0 Haxpress
  • Adafruit QT Py RP2040
  • Adafruit QT2040 Trinkey
  • Adafruit Rotary Trinkey M0
  • Adafruit SHT4x Trinkey M0
  • Adafruit Slide Trinkey M0
  • Adafruit TRRS Trinkey M0
  • Adafruit Trellis M4 Express
  • Adafruit Trinket M0
  • Adafruit Vindie S2
  • Adafruit-Qualia-S3-RGB666
  • Ai Thinker ESP32-CAM
  • AloriumTech Evo M51
  • Archi RP2040
  • Arduino MKR Zero
  • Arduino MKR1300
  • Arduino Nano 33 BLE
  • Arduino Nano 33 BLE Rev2
  • Arduino Nano 33 IoT
  • Arduino Nano ESP32
  • Arduino Nano RP2040 Connect
  • Arduino Zero
  • Artisense Reference Design RD00
  • AtelierDuMaker nRF52840 Breakout
  • AutosportLabs-ESP32-CAN-X2
  • BARDUINO 4.0.2
  • BBQ20KBD
  • BDMICRO VINA-D51
  • BLE-SS dev board Multi Sensor
  • BLING!
  • BLOK
  • BPI-Bit-S2
  • BPI-Leaf-S3
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  • BastBLE
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  • Bee-Data-Logger
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  • BlizzardS3
  • BlueMicro833
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  • Bradán Lane STUDIO Explorer Badge
  • COSMO-Pico
  • CP Sapling M0
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  • CP32-M4
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  • Challenger NB RP2040 WiFi
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  • Challenger RP2040 SD/RTC
  • Challenger RP2040 SubGHz
  • Challenger RP2040 WiFi
  • Challenger RP2040 WiFi/BLE
  • Challenger+ RP2350 BConnect
  • Challenger+ RP2350 WiFi6/BLE5
  • Circuit Playground Express Digi-Key PyCon 2019
  • CircuitART Zero S3
  • CircuitBrains Basic
  • CircuitBrains Deluxe
  • ColumbiaDSL-Sensor-Board-V1
  • CrumpS2
  • Cytron EDU PICO W
  • Cytron IRIV IO Controller
  • Cytron MOTION 2350 Pro
  • Cytron Maker Feather AIoT S3
  • Cytron Maker Nano RP2040
  • Cytron Maker Pi RP2040
  • Cytron Maker Uno RP2040
  • DFRobot Beetle ESP32-C3
  • DFRobot FireBeetle 2 ESP32-S3
  • Datanoise PicoADK
  • Datanoise PicoADK V2
  • Deneyap Kart
  • Deneyap Kart 1A
  • Deneyap Kart 1A v2
  • Deneyap Kart G
  • Deneyap Mini
  • Deneyap Mini v2
  • Diodes Delight Piunora
  • DynOSSAT-EDU-EPS
  • DynOSSAT-EDU-OBC
  • DynaLoRa_USB
  • E-Fidget
  • ELECFREAKS PICO:ED
  • ES3ink
  • ESP 12k NodeMCU
  • ESP32 Devkit V1
  • ESP32-C3-DevKitM-1
  • ESP32-C6-DevKitC-1-N8
  • ESP32-C6-DevKitM-1
  • ESP32-H2-DevKitM-1
  • ESP32-P4-Function-EV
  • ESP32-S2-DevKitC-1-N4
  • ESP32-S2-DevKitC-1-N4R2
  • ESP32-S2-DevKitC-1-N8R2
  • ESP32-S3-Box-2.5
  • ESP32-S3-Box-Lite
  • ESP32-S3-DevKitC-1-N16
  • ESP32-S3-DevKitC-1-N32R8
  • ESP32-S3-DevKitC-1-N8
  • ESP32-S3-DevKitC-1-N8R2
  • ESP32-S3-DevKitC-1-N8R8
  • ESP32-S3-DevKitC-1-N8R8-with-HACKTABLET
  • ESP32-S3-DevKitM-1-N8
  • ESP32-S3-EYE
  • ESP32-S3-USB-OTG-N8
  • ESP8684-DevKitC-02-N4
  • Electrolama minik
  • Electronic Cats Bast Pro Mini M0
  • Electronic Cats CatWAN USBStick
  • Electronic Cats Hunter Cat NFC
  • Electronic Cats NFC Copy Cat
  • Electronut Labs Blip
  • Electronut Labs Papyr
  • EncoderPad RP2040
  • Escornabot Makech
  • Espressif ESP32 DevKitc V4 WROOM-32E
  • Espressif ESP32 DevKitc V4 WROVER
  • Espressif ESP32 TTGO T8 v1.7
  • Espressif ESP32-EYE
  • Espressif ESP32-LyraT
  • Espressif-ESP32-S3-LCD-EV-Board
  • Espressif-ESP32-S3-LCD-EV-Board_v1.5
  • Espruino Bangle.js 2
  • Espruino Pico
  • Espruino Wifi
  • Feather MIMXRT1011
  • Feather MIMXRT1062
  • FeatherS2
  • FeatherS2 Neo
  • FeatherS2 PreRelease
  • FeatherS3
  • FeatherS3 Neo
  • Fig Pi
  • Flipper Zero Wi-Fi Dev
  • Fluff M0
  • Fomu
  • Franzininho WIFI w/Wroom
  • Franzininho WIFI w/Wrover
  • Freenove ESP32-WROVER-DEV-CAM
  • Gravitech Cucumber M
  • Gravitech Cucumber MS
  • Gravitech Cucumber R
  • Gravitech Cucumber RS
  • HEIA-FR Picomo V2
  • HMI-DevKit-1.1
  • Hack Club Sprig
  • Hacked Feather M0 Express with 8Mbyte SPI flash
  • HalloWing M0 Express
  • Hardkernel Odroid Go
  • Heltec ESP32-S3-WIFI-LoRa-V3
  • HexKyS2
  • HiiBot BlueFi
  • IMXRT1010-EVK
  • IMXRT1015-EVK
  • IkigaiSense Vita nRF52840
  • IoTs2
  • J&J Studios datum-Distance
  • J&J Studios datum-IMU
  • J&J Studios datum-Light
  • J&J Studios datum-Weather
  • Kaluga 1
  • LILYGO T-DECK
  • LILYGO T-DISPLAY
  • LILYGO T-DISPLAY S3 v1.2
  • LILYGO T-Display S3 Pro
  • LILYGO T-Watch-S3
  • LILYGO TEMBED ESP32S3
  • LILYGO TTGO T-01C3
  • LILYGO TTGO T-DISPLAY v1.1
  • LILYGO TTGO T-DISPLAY v1.1 4M
  • LILYGO TTGO T-OI PLUS
  • LILYGO TTGO T8 ESP32-S2
  • LILYGO TTGO T8 ESP32-S2 w/Display
  • LOLIN S3 16MB Flash 8MB PSRAM
  • LOLIN S3 MINI 4MB Flash 2MB PSRAM
  • LOLIN S3 PRO 16MB Flash 8MB PSRAM
  • Lilygo T-watch 2020 V3
  • LoC BeR M4 base board
  • Luatos Core-ESP32C3
  • M5STACK STAMP-C3
  • M5Stack Atom Echo
  • M5Stack Atom Lite
  • M5Stack Atom Matrix
  • M5Stack Atom U
  • M5Stack AtomS3
  • M5Stack AtomS3 Lite
  • M5Stack AtomS3U
  • M5Stack Cardputer
  • M5Stack Core Basic
  • M5Stack Core Fire
  • M5Stack Core2
  • M5Stack CoreS3
  • M5Stack Dial
  • M5Stack M5Paper
  • M5Stack Stick C
  • M5Stack Stick C Plus
  • M5Stack Timer Camera X
  • MDBT50Q-DB-40
  • MDBT50Q-RX Dongle
  • MEOWBIT
  • MORPHEANS MorphESP-240
  • MagiClick S3 N4R2
  • Maker Go ESP32C3 Supermini
  • Maker Go ESP32C6 Supermini
  • Maker badge by Czech maker
  • MakerDiary nRF52840 MDK
  • MakerDiary nRF52840 MDK USB Dongle
  • MakerFabs-ESP32-S3-Parallel-TFT-With-Touch-7inch
  • Makerdiary M60 Keyboard
  • Makerdiary Pitaya Go
  • Makerdiary nRF52840 Connect Kit
  • Makerdiary nRF52840 M.2 Developer Kit
  • Maple Computing Elite-Pi
  • Melopero Shake RP2040
  • Meow Meow
  • Metro MIMXRT1011
  • MicroDev microC3
  • MicroDev microS2
  • Mini SAM M4
  • MixGo CE
  • NUCLEO F446RE
  • NUCLEO STM32F746
  • NUCLEO STM32F767
  • NUCLEO STM32H743
  • NanoS3
  • Neuron
  • NodeMcu-ESP32-C2
  • OMGS3
  • OPENMV-H7 R1
  • Oak Dev Tech BREAD2040
  • Oak Dev Tech Cast-Away RP2040
  • Oak Dev Tech PixelWing ESP32S2
  • Oak Dev Tech RPGA Feather
  • Open Hardware Summit 2020 Badge
  • Oxocard Artwork
  • Oxocard Connect
  • Oxocard Galaxy
  • Oxocard Science
  • P1AM-200
  • PCA10056 nRF52840-DK
  • PCA10059 nRF52840 Dongle
  • PCA10100 nRF52833 DK
  • PYB LR Nano V2
  • Pajenicko PicoPad
  • Particle Argon
  • Particle Boron
  • Particle Xenon
  • PewPew 10.2
  • PewPew LCD
  • PewPew M4
  • PicoPlanet
  • PillBug
  • Pimoroni Badger 2040
  • Pimoroni Badger 2040 W
  • Pimoroni Inky Frame 5.7
  • Pimoroni Inky Frame 7.3
  • Pimoroni Interstate 75
  • Pimoroni Keybow 2040
  • Pimoroni Motor 2040
  • Pimoroni PGA2040
  • Pimoroni PGA2350
  • Pimoroni Pico DV Base W
  • Pimoroni Pico LiPo (16MB)
  • Pimoroni Pico LiPo (4MB)
  • Pimoroni Pico Plus 2
  • Pimoroni Pico dv Base
  • Pimoroni PicoSystem
  • Pimoroni Plasma 2040
  • Pimoroni Plasma 2040W
  • Pimoroni Plasma 2350
  • Pimoroni Servo 2040
  • Pimoroni Tiny 2040 (2MB)
  • Pimoroni Tiny 2040 (8MB)
  • Pimoroni Tiny 2350
  • Pimoroni Tiny FX
  • ProS3
  • PyCubedv04
  • PyCubedv04-MRAM
  • PyCubedv05
  • PyCubedv05-MRAM
  • PyKey 18 Numpad
  • PyKey 44 Ergo
  • PyKey 60
  • PyKey 87 TKL
  • PyboardV1_1
  • RF.Guru RP2040
  • RGBTouch Mini
  • RP2.65-F
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  • RP2350 Stamp XL
  • Raspberry Breadstick
  • Raspberry Pi 4B
  • Raspberry Pi Compute Module 4
  • Raspberry Pi Compute Module 4 IO Board
  • Raspberry Pi Pico
  • Raspberry Pi Pico 2
  • Raspberry Pi Pico W
  • Raspberry Pi Zero
  • Raspberry Pi Zero 2W
  • Raspberry Pi Zero W
  • Robo HAT MM1 M4
  • S2Mini
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  • SAM E54 Xplained Pro
  • SAM32v26
  • SPRESENSE
  • SQFMI Watchy
  • SSCI ISP1807 Dev Board
  • SSCI ISP1807 Micro Board
  • ST STM32F746G Discovery
  • STM32F411E_DISCO
  • STM32F412G_DISCO
  • STM32F4_DISCO
  • Saola 1 w/Wroom
  • Saola 1 w/Wrover
  • Seeed Studio XIAO ESP32C3
  • Seeed XIAO nRF52840 Sense
  • Seeed Xiao ESP32-C6 4MB Flash 512KB SRAM
  • Seeed Xiao ESP32-S3 Sense
  • Seeeduino Wio Terminal
  • Seeeduino XIAO
  • Seeeduino XIAO KB
  • Seeeduino XIAO RP2040
  • Seeeduino XIAO RP2350
  • Serpente
  • SiLabs xG24 Dev Kit
  • SiLabs xG24 Explorer Kit
  • Silicognition LLC M4-Shim
  • Silicognition LLC RP2040-Shim
  • Simmel
  • SparkFun LUMIDrive
  • SparkFun MicroMod RP2040 Processor
  • SparkFun MicroMod SAMD51 Processor
  • SparkFun MicroMod nRF52840 Processor
  • SparkFun Pro Micro RP2040
  • SparkFun Pro Micro RP2350
  • SparkFun Pro nRF52840 Mini
  • SparkFun Qwiic Micro
  • SparkFun RedBoard Turbo
  • SparkFun SAMD21 Dev Breakout
  • SparkFun SAMD21 Mini Breakout
  • SparkFun STM32 MicroMod Processor
  • SparkFun Teensy MicroMod Processor
  • SparkFun Thing Plus - RP2040
  • SparkFun Thing Plus - SAMD51
  • SparkFun Thing Plus - STM32
  • Sparkfun Thing Plus MGM240P
  • Spotpear ESP32C3 LCD 1.44
  • Sprite_v2b
  • StackRduino M0 PRO
  • Sunton ESP32-2424S012
  • Sunton-ESP32-8048S050
  • Sunton-ESP32-8048S070
  • SuperMini NRF52840
  • Swan R5
  • TG-Boards' Datalore IP M4
  • TG-Watch
  • THUNDERPACK_v11
  • THUNDERPACK_v12
  • TTGO T8 ESP32-S2-WROOM
  • Targett Module Clip w/Wroom
  • Targett Module Clip w/Wrover
  • Teensy 4.0
  • Teensy 4.1
  • Teknikio Bluebird
  • The Open Book Feather
  • ThingPulse Pendrive S3
  • TinkeringTech ScoutMakes Azul
  • TinyC6
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  • TinyWATCH S3
  • Trinket M0 Haxpress
  • UARTLogger II
  • VCC-GND Studio YD RP2040
  • VCC-GND YD-ESP32-S3 (N16R8)
  • VCC-GND YD-ESP32-S3 (N8R8)
  • VIDI X V1.1
  • W5100S-EVB-Pico
  • W5500-EVB-Pico
  • WK-50 Trackball Keyboard
  • WSC-1450
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  • Waveshare ESP32-S2-Pico
  • Waveshare ESP32-S2-Pico-LCD
  • Waveshare ESP32-S3-GEEK
  • Waveshare ESP32-S3-Pico
  • Waveshare ESP32-S3-Tiny
  • Waveshare ESP32-S3-Zero
  • Waveshare ESP32S3 LCD 1.28
  • Waveshare RP2040-GEEK
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  • keithp.com snekboard
  • micro:bit v2
  • nanoESP32-S2 w/Wrover
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  • ndGarage[n°] Bit6: FeatherSnow-v2
  • ndGarage[n°]Bit6:FeatherSnow
  • nice!nano
  • nullbits Bit-C PRO
  • senseBox MCU
  • senseBox MCU-S2 ESP32S2
  • splitkb.com Liatris
  • stm32f411ce-blackpill
  • stm32f411ce-blackpill-with-flash
  • sunton_esp32_2432S028
  • sunton_esp32_2432S032C
  • takayoshiotake Octave RP2040
  • uChip
  • uGame10
  • uGame22

storage.mount(filesystem: VfsFat, mount_path: str, *, readonly: bool = False) None

Mounts the given filesystem object at the given path.

This is the CircuitPython analog to the UNIX mount command.

Parameters:
  • filesystem (VfsFat) – The filesystem to mount.

  • mount_path (str) – Where to mount the filesystem.

  • readonly (bool) – True when the filesystem should be readonly to CircuitPython.

storage.umount(mount: str | VfsFat) None

Unmounts the given filesystem object or if mount is a path, then unmount the filesystem mounted at that location.

This is the CircuitPython analog to the UNIX umount command.

storage.remount(mount_path: str, readonly: bool = False, *, disable_concurrent_write_protection: bool = False) None

Remounts the given path with new parameters.

Parameters:
  • mount_path (str) – The path to remount.

  • readonly (bool) – True when the filesystem should be readonly to CircuitPython.

  • disable_concurrent_write_protection (bool) – When True, the check that makes sure the underlying filesystem data is written by one computer is disabled. Disabling the protection allows CircuitPython and a host to write to the same filesystem with the risk that the filesystem will be corrupted.

storage.getmount(mount_path: str) VfsFat

Retrieves the mount object associated with the mount path

storage.erase_filesystem(extended: bool | None = None) None

Erase and re-create the CIRCUITPY filesystem.

On boards that present USB-visible CIRCUITPY drive (e.g., SAMD21 and SAMD51), then call microcontroller.reset() to restart CircuitPython and have the host computer remount CIRCUITPY.

This function can be called from the REPL when CIRCUITPY has become corrupted.

Parameters:

extended (bool) – On boards that support dualbank module and the extended parameter, the CIRCUITPY storage can be extended by setting this to True. If this isn’t provided or set to None (default), the existing configuration will be used.

Note

New firmware starts with storage extended. In case of an existing filesystem (e.g. uf2 load), the existing extension setting is preserved.

Warning

All the data on CIRCUITPY will be lost, and CircuitPython will restart on certain boards.

storage.disable_usb_drive() None

Disable presenting CIRCUITPY as a USB mass storage device. By default, the device is enabled and CIRCUITPY is visible. Can be called in boot.py, before USB is connected.

storage.enable_usb_drive() None

Enabled presenting CIRCUITPY as a USB mass storage device. By default, the device is enabled and CIRCUITPY is visible, so you do not normally need to call this function. Can be called in boot.py, before USB is connected.

If you enable too many devices at once, you will run out of USB endpoints. The number of available endpoints varies by microcontroller. CircuitPython will go into safe mode after running boot.py to inform you if not enough endpoints are available.

class storage.VfsFat(block_device: circuitpython_typing.BlockDevice)

Create a new VfsFat filesystem around the given block device.

Parameters:

block_device – Block device the the filesystem lives on

label: str

The filesystem label, up to 11 case-insensitive bytes. Note that this property can only be set when the device is writable by the microcontroller.

readonly: bool

True when the device is mounted as readonly by the microcontroller. This property cannot be changed, use storage.remount instead.

static mkfs(block_device: circuitpython_typing.BlockDevice) None

Format the block device, deleting any data that may have been there.

Limitations: On SAMD21 builds, mkfs() will raise OSError(22) when attempting to format filesystems larger than 4GB. The extra code to format larger filesystems will not fit on these builds. You can still access larger filesystems, but you will need to format the filesystem on another device.

open(path: str, mode: str) None

Like builtin open()

ilistdir(path: str) Iterator[Tuple[AnyStr, int, int, int] | Tuple[AnyStr, int, int]]

Return an iterator whose values describe files and folders within path

mkdir(path: str) None

Like os.mkdir

rmdir(path: str) None

Like os.rmdir

stat(path: str) Tuple[int, int, int, int, int, int, int, int, int, int]

Like os.stat

statvfs(path: int) Tuple[int, int, int, int, int, int, int, int, int, int]

Like os.statvfs

mount(readonly: bool, mkfs: VfsFat) None

Don’t call this directly, call storage.mount.

umount() None

Don’t call this directly, call storage.umount.