I just went through some contortions trying to recover one of my 128 GB flash drives. I use these with my Pixel-C android tablet to load files to the device.

It appears that android (at least stock android) only understands FAT32 and windows refuses to format a flash drive of this size with anything by exFAT or NTFS.

After cancelling a format operation on windows (and thus invalidating the format on the drive) I found that the Pixel-C would format it to FAT32 itself. Not sure why the conflict, but it was certainly frustrating.

I still can’t find an SD card reader that will work with the Pixel-C. I now have a couple with USB-C connectors and then work through an adapter to my older devices. None show up on the Pixel in any way. I’m not sure whether the device that work have extended driver support (they’re Samsung devices) or whether the Pixel-C intentionally defeats access to external media readers.