I have a couple of Micro Center branded 256GB USB 3.1 drives which will not remain mounted. I am using them with a mid 2012 MacBook Pro but have observed the same behavior on a 2010 Mac Pro and two late 2014 27" 5K iMac systems. The MacBook Pro is running macOS Catalina, the Mac Pro is running macOS Mojave, and the iMacs are running macOS Big Sur. All systems have the latest updates applied.
When inserted the disks appear on the desktop and then shortly thereafter they suddenly disappear with the message that the drive was improperly unmounted (or something to that effect). I can then remove and reinsert the drive upon which it appears on the desktop again. Only to disappear once again. I have formatted both drives with different filesystems (macOS journaled and exFAT) with no change in behavior. Formatted each on all three systems, no change.
These same drives work fine in my Windows systems. I do not have a a Macintosh system running Windows so I cannot isolate it to hardware or software. The issue appears to be with the "newer" style drives as I have an "older" style which doesn't exhibit this problem. I've attached a pic of the two style of drives. Purple is newer, yellow is older. The Purple drive is 256GB whereas the yellow drive is 128GB. However this is not the difference as I have an "older" style 256GB drive which does not exhibit this problem, I only took a pic of the 128GB drive to more easily differentiate between the two styles by referencing color.
Perhaps I just got some bad drives and I'm sure Micro Center will swap them out. However if it's a problem with the newer style drives I might have to avoid purchasing them going forward. Which would be a disappointment because they're reasonably priced.
Anyone experience this issue? If so any suggestions on how to correct it?
When inserted the disks appear on the desktop and then shortly thereafter they suddenly disappear with the message that the drive was improperly unmounted (or something to that effect). I can then remove and reinsert the drive upon which it appears on the desktop again. Only to disappear once again. I have formatted both drives with different filesystems (macOS journaled and exFAT) with no change in behavior. Formatted each on all three systems, no change.
These same drives work fine in my Windows systems. I do not have a a Macintosh system running Windows so I cannot isolate it to hardware or software. The issue appears to be with the "newer" style drives as I have an "older" style which doesn't exhibit this problem. I've attached a pic of the two style of drives. Purple is newer, yellow is older. The Purple drive is 256GB whereas the yellow drive is 128GB. However this is not the difference as I have an "older" style 256GB drive which does not exhibit this problem, I only took a pic of the 128GB drive to more easily differentiate between the two styles by referencing color.
Perhaps I just got some bad drives and I'm sure Micro Center will swap them out. However if it's a problem with the newer style drives I might have to avoid purchasing them going forward. Which would be a disappointment because they're reasonably priced.
Anyone experience this issue? If so any suggestions on how to correct it?
