I bought a 256G flash drive off Amazon (SanDisk Ultra 256GB Flash SDCZ48 256G for $60) and then copied all 100,000+ 100G install files, user tracks, etc. for the EverythingPAK from the hard drive to the flash drive.

I then timed the loading of BIAB on the hard drive versus the flash drive. It came up a few seconds faster on the flash drive. Everything is running perfectly. It did take several hours to copy everything over, but once it finished, all is well.