- You can't fix it, but sometimes you can improve performance a bit.
Using Device Manager to optimize for performance instead of for quick removal and formatting using NTFS can sometimes help a little.
With some ZIP tools, you can copy many small files into one ZIP/RAR/... archive on the USB stick, which might be significantly faster than copying all the small files directly.
- You will probably need to buy a USB stick that is explicitly advertised as a high performance drive, although sometimes you can get lucky with performance of regular USB sticks. I don't know which specific drives available now will fit the bill.