Easily store and access 5tb of content on the go with the seagate portable drive, a usb external hard drive designed to work with windows or mac computers, this external hard drive makes backup a snap just drag and drop to get set up, connect the portable hard drive to a computer for automatic recognition software required this usb drive provides plug and play simplicity with the included 18. 3tb 3072.0: 2 years: 179.4mm: 118.10mm: 860g: backup plus for mac desktop thunderbolt 3tb hard drive stcb3000400 3 year limited warranty. Backup plus for mac desktop drive 3tb stdu3000101 2 year limited warranty. and your all your files and applications mac from a time machine backup. so, if anything happens to your mac you can restore your mac’s specific set up. Reason 1, your mac can use a seagate external hard drive formatted as hfs for a time machine backup. Seagate backup plus portable 4tb external hard drive hdd – black usb 3.0 for pc laptop and mac, 1 year myliocreate, 2 months adobe cc photography, 2 year rescue service (sthp4000400) 4.7 out of 5 stars.