LaCie 3TB external hard drive ejecting improperly

Anybody have experiences with a LaCie external hard drive ejecting improperly? Not able to run long enough to do proper back ups and file maintenace. Closes or ejects on its own.

I just replaced a 2TB LaCie with an 8TB model and encountered the same problem I would get a "disc improperly ejected" message and since my iTunes library is stored there the app would go into kernel panic and require a force quit. Very annoying.
I switched from the thunderbolt ports to the USB and have not had any issues since.
I never had any issue with my My older HD so I think maybe the Thunderbolt connector that came with the new drive was bad.

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