I was making a tool holder and when I came to the spot for the flashdrive I decided to give them a protector. There is no assembly required.
I used the K1 and .2mm layer height. The speed was set at 250 mm/s and the total print time was about 18 minutes. I used four walls but that was just my preference to avoid having to mess with the infill too much. The base still uses a little bit of infill so I used 10%.
The fit to the USB is perfect