The devices memory cards are installed on may use a variety of operating systems, such as Windows, Linux and so on. ... To avoid such issues, we strongly suggest you format the memory card before using it for the first time on any new device.

Do SD cards need to be formatted?

Important: Formatting an SD card is permanent. Once an SD card is deleted, there's no way to recover the erased files. As such, make sure to back up all the data you want to keep before formatting.

What happens if you don't format your SD card?

There's no shame in one side or the other, but if you don't format your SD card for a while, there could be problems. Whether it be weeks, months, or years, your SD card will see hundreds of thousands of files. Even if you manually delete a few photos and videos, the SD card never gets a chance to breathe.