Use the method included in the Toshiba instructions for updating the firmware
Go ahead and install the Toshiba program for accessing the FlashAir from your computer's SD reader. This will show that the device is working properly.
Back up the contents of the FlashAir.
In Linux, you will need to reformat to FAT32. However, you may have intermittent problems with getting the card recognized, since it is exFAT. Just keep rebooting your computer until the card is seen (full shutdown each time). Here are some further tips if you feel stuck.
Once the card is formatted to FAT32, follow the current instructions for backing up the Deluge stock SD card, unzipping downrush over the FlashAir's contents, and copying the Deluge files back onto the FlashAir.
Test the FlashAir from Linux (i.e., while it is in your computer's SD reader) to ensure it is working there.
Unmount the FlashAir and insert into the Deluge, then power the Deluge on.
Go to song view and try to create a new clip/track.
If you get a Fold error, you made a mistake, probably in copying the Deluge folders or in formatting the SD card.
Some of this might be useful for all platforms
Folderror, you made a mistake, probably in copying the Deluge folders or in formatting the SD card.