MicroSD card setup

It is important to insert the microSD card into your Flipper Zero before updating the firmware. The microSD card stores various types of data, such as keys, cards, remotes, databases, and more. Flipper Zero supports FAT12, FAT16, FAT32, and exFAT file systems and is compatible with microSD cards up to 256 GB, but a 4 GB microSD card is sufficient to store all the necessary data. Keep in mind that the process of mounting a microSD card with a high storage capacity may require additional time.
Unlike modern smartphones and computers that use a high-speed SDIO interface, Flipper Zero uses a slower energy-efficient SPI interface. Despite being slower than SDIO, Flipper Zero's SPI interface can read data at almost 400 KB per second, which is sufficient for the device's tasks.
It is important to carefully review the product details before purchasing a microSD card, as some manufacturers advertise that their cards are compatible with the SPI mode.
To insert the microSD card into your Flipper Zero, do the following:
Locate the microSD card slot on your Flipper Zero—it's at the bottom of the device.
Hold the microSD card with pins facing up. Align the microSD card with the slot and gently push it in until the card clicks into place.
Check if your Flipper Zero recognizes the microSD card.

In case you see the message above on the screen after inserting the microSD card, it may be due to one of the following reasons:
- The microSD card doesn’t have an SPI interface. -> Try using a different microSD card.
- The microSD card has a file system other than FAT12, FAT16, FAT32, or exFAT. -> Format the microSD card.
- There is no file system on the microSD card. -> Format the microSD card.
- The microSD card is damaged. -> Try using a different microSD card.
Sometimes, a microSD card may fail to mount correctly. It might happen if the microSD card uses an incompatible file system or doesn't have one. If the card didn't mount after insertion, try to format it. Once formatted, the microSD card will have a FAT32 file system.
To format your microSD card, do the following:
Go to Main Menu -> Settings -> Storage.
Select Format SD Card and follow the instructions on the screen.

If the formatting procedure was unsuccessful, try formatting the microSD card with the help of a PC or use a different microSD card.

It is important to remove microSD cards safely to prevent potential data loss or corruption. When a microSD card is in use, Flipper Zero reads from and writes to the card. If you remove the card while the device is still accessing it, you may corrupt the data or damage the file system on the card.
To safely remove the microSD card from your Flipper Zero, do the following:
Go to Main Menu -> Settings -> Storage.
Select Unmount SD Card and follow the instructions on the screen.

Once you have been notified that the microSD card is unmounted, remove the card from your Flipper Zero by gently pushing and then pulling the card.