Using 2 Mac utilities I'm still not sure if the 3 units I received were converted to Mac format. The first indication that the drive was formatted for MS-DOS came when my attempt to rename the drive produced an error message stating that the new name was not acceptable because it contained some non-alphabetic characters (one character β’) contained and was too long. For real. My first utility refused my erase and reformat request because it couldn't unmount the drive. My second utility was able to delete it, but I'm not sure which format works now. If there are any issues I will update this review in time to shorten the deadline for returning flash drives for a refund.
Sandisk Ultra Flair 128 GB Silver USB Flash Drive: Reliable and High-Speed Storage
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π Seagate Expansion 3TB Portable USB 3.0 External Hard Drive (STEA3000400) in Black
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2 TB External HDD ADATA DashDrive Durable HD650, USB 3.2 Gen 1, Blue
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2 TB External HDD Western Digital WD Elements Portable (WDBU), USB 3.0, black
84 Review