These 5 flash drives are meant to hold 2GB. I've tried two and they only fit about 13 megabytes before they stop adding data. The warning states that some of the 13 megabytes should be deleted. add more data to the hard drive even though the hard drive is almost empty. The disk information shows only 13 megabytes out of 2 GB. I'm using IMAC, not Windows. Maybe they are not IMAC compatible or I have some bad flash drives. UPDATE: Today while testing the rest of my drives, Imac informed me that I have options to optimize these drives. This came as a surprise to me as most of the products I buy are IMAC powered and plug and play. These 5 flash drives are not. I had to erase, rename and reformat all 5 drives. Everything went quickly, but these 2.0 flash drives boot very slowly. Now that they all have to work with IMAC, I can use them, but only for very small amounts of data. I've been using an IMAC for over 8 years and have bought several flash drives but these 5 are the only ones that didn't work out of the box on my IMAC.
Titan Gray Samsung BAR Plus 256GB USB 3.1 Flash Drive (MUF-256BE4/AM) with Up to 400MB/s Transfer Speed
69 Review
32GB SanDisk USB Flash Drive (SDCZ430-032G-A46)
78 Review
Samsung BAR Plus 128GB - High-Speed USB 3.1 Flash Drive Titan Gray (MUF-128BE4/AM)
67 Review
Kingston DataTraveler SE9 32GB USB 2.0 Flash Drive for Reliable Data Storage (DTSE9H/32GBZ)
69 Review
Shock-Resistant Transcend StoreJet 25M3 USB 3.1 Slim Portable Hard Drive with 500GB Capacity
99 Review
18 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
95 Review
π Seagate Expansion 3TB Portable USB 3.0 External Hard Drive (STEA3000400) in Black
60 Review
Game console Microsoft Xbox One X 1000 GB HDD, black
53 Review