I bought 2 of these portable USB 3.0 MiniStation 2TB Buffalo I bought 2 of these external hard drives. I use them on both PC and Mac. The trick to using them on both PC and MAC is to format them as EX-FAT. I don't fully trust any external hard drive, so I always back up my data to another external hard drive just in case. It's also a good idea to back up your data to the cloud.
2 TB External HDD Western Digital WD Elements Portable (WDBU), USB 3.0, black
84 Review
Shock-Resistant Transcend StoreJet 25M3 USB 3.1 Slim Portable Hard Drive with 500GB Capacity
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Game console Microsoft Xbox One X 1000 GB HDD, black
53 Review
2 TB External HDD ADATA DashDrive Durable HD650, USB 3.2 Gen 1, Blue
55 Review
SAMSUNG T7 Portable SSD 1TB: Fast and Reliable USB 3.2 External Solid State Drive in Gray
13 Review
π SAMSUNG T5 Portable SSD 2TB - High-Speed USB 3.1 External Solid State Drive, Black (MU-PA2T0B/AM)
40 Review
π StarTech.com 3.5in Silver Aluminum USB 3.0 External SATA III SSD / HDD Enclosure with UASP - Portable USB 3 3.5" SATA Hard Drive Housing (S3510SMU33)
10 Review
Samsung T5 Portable SSD MU PA500B
88 Review