Question: what are best external hard drives?
Answer: Western Digital My Passport 4TB. The overall best external hard drive for Mac or PC. ... 
Samsung Portable SSD T5. The best high-speed external storage device. ... 
G-Technology G-RAID with Thunderbolt 3. ... 
Buffalo MiniStation Thunderbolt. ... 
LaCie Porsche Design Mobile Drive 4TB. ... 
Adata SD700 External SSD. ... 
WD My Book Duo. ... 
LaCie Rugged USB-C.