
The situation is actually even worse than the above numbers show because average write speed drops to much closer to 10MB/s after extended use.


Should you wish to move that near-2TB movie collection over to the Ultra Slim then be prepared for a long wait.over 16 hours in fact. The drive's Achilles' heel is the write speed, averaging just 33MB/s over this relatively short test. The Ultra Slim produces the kind of sequential read numbers that make attractive reading and marketing collateral. These are the kind of peak speeds you would expect if transferring multiple large files to and from the drive. Sequential tests show storage appliances in the best possible light. An extra wrinkle is introduced with the 8TB Seagate Innov8 that's powered by USB Type-C. We have three other portable storage devices in our line-up: a 256GB Patriot USB pen drive, a 512GB SK hynix SSD attached via a cheap-and-cheerful SATA-to-USB 3.0 cable, as well as a 2TB My Passport Ultra.
