The original post: /r/datahoarder by /u/Inmyprime- on 2024-12-17 18:15:35.

I have two Terramaster d5-300C enclosures I bought years ago and everything seemed fine on my old iMac 2015.

Recently, I upgraded to Mac Mini M4 pro (and also to Sequoia) and I have been having issues with the external hard drives ever since.

Often they unmount, randomly, or won’t unmount at all (it says some process is using them, even if I can’t see anything using them), they also randomly grey out sometimes and stop working (first aid won’t work, I have to reformat to get them to work again, something about invalid Node structure after I run first aid…).

I can’t work out if it is the drives failing or if it’s the enclosures (they are old) or something else. Any idea how to narrow it down?

I also run Carbon Copy Cloner to backup.