basic VM backup

Good morning

I have a little Dell server for home lab running ESXi and 5 VM (Windows server, Windows 10, Ubuntu, etc.)

Sometime I need to backup VM, usually when I perform changes, and usually I export the VM to OVF format.For my purpose it is enough.

Unfortunately one of the VM has a BIG raw device disk that is saved by its own and if I export to OVF it tries also to export the raw disk and I do not want to do it (not enough free TByte).

Question:

is there any way to avoid the raw disk to be also exported to the OVF?

or

what are the files I should manually copy to ensure the backup?

regards.