A quick trick to fool Windows into enabling FAT32 in the GUI is to enable caching on the USB-memory:Right-click the USB-drive and select "Properties" Select the "Hardware"-tab Find and select your USB-memory in the list Click the "Properties"-button below Select the "Policies"-tab on the new requester Choose "Optimize for performance" Click "OK" on the requesters This should allow you to use FAT32-formatting on your USB-drive, but don't forget to repeat the process and set it back to "Optimize for quick removal" once you are done formatting! But remember, FAT32 only allows files up to 4GB in size and can't handle soft-links or permissions. Trasferring files over network and formatting as ext3/4 makes the microSD much more useful.
Right-click the USB-drive and select "Properties" Select the "Hardware"-tab Find and select your USB-memory in the list Click the "Properties"-button below Select the "Policies"-tab on the new requester Choose "Optimize for performance" Click "OK" on the requesters