I am using a Crucial P1 NVMe 2280 M.2 SSD as an external storage device installed in a Sabrent enclosure. I installed the drive, plugged in via USB 3.0 to my iMac and initialized the drive. Worked fine, appeared on the desktop and in the Finder window. Copied about 50Gb of data onto it, then it sudden disappeared from the desktop and the copy procedure stopped. I disconnected the drive and replugged it. The drive appeared briefly, then unmounted again. If I log out, disconnect and reconnect the drive, then log back, it works again for a while, then unmounts (10-15 minutes). Any ideas on how to address this?
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