I had a need to format a USB memory stick for FAT16 for a device to read some data.

You will need to ensure that Memory Stick is 2gb or less

1. Insert the usb memory stick into your computer
2. You’ll need to know the driveletter it gets assigned. We’ll use E: for this guide
3. Click on START
4. Click on RUN
5. Type:

cmd.exe

6. Click OK or press Enter
7. In the black window type FORMAT E: /FS:FAT16 (it could be /fs:fat depends on which version windows you have)

That should do it. If you want to go back to FAT32 use “FAT32” as the option. NTFS use NTFS

This will also work for SD cards