NTFS formatted, compressed, and indexed
That's where your problem is. It's advised not to use Windows software compression and let the SSD controller manage that (it does that automatically under the hood).
Make sure to check you don't have some SATA devices on a port that also shares the PCIe lanes with the M.2 port.
Okay, I'll try that
Decompressing (14 hours remaining) lol
Check your motherboard's user guide settings to make sure the M.2 port isn't shared with another SATA device. If that's the case, move your SATA device to another port to free the PCIe lanes for the M.2 port.
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