I have a Kingston DataTraveler 50 (3.1 | 64GB) that I wish to use as extended storage for applications.

When I first put the usb stick (formatted as it was by the manufacturer, Kingston), the TV and ES Explorer recognized the device normally and I was able to browse the preinstalled files.

It gave me the option to keep it as a regular media disk, or format it for either use as recording device or extended storage. Extended storage was what I wanted. However, after trying to format the stick, it exits with an error "Format failed" (or something very similar). After that the USB stick becomes unusable, and Windows cannot format it with the built in format tool.

Partition Manager does work, and is able to see what seems to be going wrong:

The TV formats the stick to GPT (from MBR) and then attempts to create two partitions, one 16 MB (FAT32) and another for the remainder ("Other" - not EXT3/4, NTFS, etc.). The 16 MB FAT32 partition appears corrupted every time. The only option is to delete both partitions and revert back to FAT32 or NTFS, upon which point the stick becomes again recognized in both Windows 10 and the Bravia, but the TV keeps doing the same thing every time I retry to format the stick as extended storage.

I even tried a couple of impromptu hacks, such as reformatting only the first 16MB FAT32 partition in to FAT16 (because, AFAIK FAT32 isn't useable for such small partition sizes). I also tried deleting it and only keeping the "Other" partition. Nothing however.

Any known solutions? Has anyone been experiencing this? I cannot be the only one!