Reformatted and made it bootable for SUF 14, 64 gigs is adequate for it, but there was not enough free space left for half a gig, so I purchased 128 GB in alik with a 50% discount for 760 128 GB, real capacity (with an honest calculation of 1024 bytes = 1 kb). According to the manufacturer, the 1192022 GB 128 GB flash drive is compatible with USB version 3.1; however, this remains to be tested.
Compact and Convenient: SanDisk Cruzer Fit USB 32GB Flash Drive (SDCZ33-032G-A11)
66 Review
Samsung BAR Plus 128GB USB 3.1 Flash Drive - 400MB/s - Champagne Silver (MUF-128BE3/AM)
65 Review
Titan Gray Samsung BAR Plus 256GB USB 3.1 Flash Drive (MUF-256BE4/AM) with Up to 400MB/s Transfer Speed
69 Review
Kingston DataTraveler flash drive 100 G3 256 GB, 1 pc. black
74 Review
2 TB External HDD Western Digital WD Elements Portable (WDBU), USB 3.0, black
84 Review
2 TB External HDD ADATA DashDrive Durable HD650, USB 3.2 Gen 1, Blue
55 Review
Shock-Resistant Transcend StoreJet 25M3 USB 3.1 Slim Portable Hard Drive with 500GB Capacity
99 Review
8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
56 Review