[Neil Forsyth]

I have to agree with everything Glenn said, but check that the seller is the registered owner as well as they will have to fill out a transfer of ownership license and you will have to pay Avid an admin cost to do this. Last dongle I bought cost an additional £300 to transfer to my name before I could upgrade it.

[Neil Forsyth]

Make sure you what you are trying to link to in resolve is a supported format.

https://images.blackmagicdesign.com/media/5407521/DaVinci_Resolve_9.1_Supported_Codec_List.pdf

Is it a PIX 240? these save as:

Apple ProRes 4444, 330 Mb/s, 12-bit
Apple ProRes 36, 100, 145, 220 Mb/s, 8 and 10-bit
Avid DNxHD 36, 145, 220 and 220x
Quicktime wrapper (.MOV), UDF File System

When I ingest rushes I tend to AMA all media and then comp sequences and transcode everything a DNx MXF which gives me a files I can link to via AAF import in resolve.

Hope this helps.