I'm looking for an external SSD for backup on my system: mobo is Asus X79 Deluxe.
I would like NVMe. Are all such SSD drives internal cards or do some of them connect by USB?
There are external enclosures that will accept an NVMe drive.
But...for backups? WHY would you do that?
The speed of the NVMe is cut down by the USB interface.
And an X79 based system predates M.2 and NVMe by several years. You're spending money on new tech that is pretty much useless on that old system.
For a backup drive, there is ZERO benefit for a NVMe drive. Especially in an old system.