If your USB is loose i suggest a small amount of hot glue to hols it in place. However mine was vary secure without any so i let it be. Maybe used in ...
How to upgrade an old memory chip to fit into a new console or a computer. Maybe you just want a unique USB stick. Anyway the project costs only a few dollars (If you don't have a spare usb drive), takes only a few tools and small amount of time. I used a PS2 memory card but i'm sure the same steps can be used to upgrade a PS1 memory chip too.
1 x USB Thumbstick
1 x PS2/PSX Memory Card
Hot Glue (optional)
Step 2: Extract The Guts From The USB Drive
Depending on your USB you may need to pry it open with a small screw driver or undo some tiny screws. However mine came apart easily with just my finger nail.
Step 3: Open Memory Card
Next you need to undo the two screws holding the card together. After dislodge the PCB from the housing.
Step 4: Dry Fit
In order to get my USB to fit i needed to cut the two small pegs that were in the way. I tried a file but it took to long so instead i brought out the trusty exacto knife. The main point is that the USB fits in when both the plastic covers are screwed closed again.
Step 5: Finishing Touches
If your USB is loose i suggest a small amount of hot glue to hols it in place. However mine was vary secure without any so i let it be. Maybe used in another project later (Floppy Disk?). Next thing is to test it out. There it is a 8 mb memory card upgraded to a 4g USB drive.