My Kogan TV with PVR and standalone PVR both allow me to record onto USB.
I found the raw TS files generated by these sometimes had issues with interlacing lines and audio being out of sync, so I now convert the raw TS file into MP4 using “Free TS converter” (the free version doesn’t allow you to use all options, but you can convert into 720p or 1080p which is good enough for me).
I then edit these files in Adobe Premiere, but the converted files are very stable unlike TS files so should work well in any editor.
You may find that the MPG files you’re recording to are in fact TS files - so you may be able to change the extension to .ts and then use to TS converter. I found this to be the case with an old recording I found from an old PC tuner.