Thread safe in FatFS

[Shang Ting]

I am using FreeRTOS with FatFS/SD card. SDK is nRF5_SDK_17.0.2.

If different tasks access FatFS API in different task, is it thread-safe? i.e. Task A access file A and task B access file B at the same time. 

Could SPI communication on SD card be interrupted by another task with another FatFS API?

[Susheel Nuguru]

FatFs is an external module and it does not look to me that for the same drive/volume the access is re-entrant.
There is an external documentation on the re-entrancy capabilities table that can answer your question.