What are the external SSD requirements for the External Drive Editing feature?
The External Drive Editing function works best with SSDs at 1050 Mbps or higher read speeds and only works with USB-C or a Thunderbolt 3 connection**.** We do not recommend using a hard disk drive (HDD) with LumaFusion.
We would strongly recommend, if possible, that you reformat your drive to APFS. Typically all new drives are formatted as ExFAT.
Currently, formatting drives can only be done using a Mac.
For more information on how to format an SSD look here: https://support.apple.com/guide/disk-utility/erase-and-reformat-a-storage-device-dskutl14079/mac