Black Hole
May contain traces of nut
1) When copying .ts files off my auxiliary Humax USB drive, using a Linux type viewing editor (Disk Internals) I either don't seem to manage to transfer the whole recording (especially if it's more than an hour long)
Another point to remember: a FAT32 drive cannot accommodate files greater than 4GB in size - the Humax will appear to copy, but the file will be truncated without warning. This might explain your clipped copies problem. As mentioned above, unless you took specific action to ensure the HiDef recordings are decrypted, what you will get on the USB drive is an encrypted copy no use to man nor beast except to play from the same Humax. That might explain your other clip problem, though how you would get even a minute's worth is beyond me.
Many of your queries are answered in the get-you-going texts, in particular the Glossary (click) explains much in reasonably simple terms (in this case see the entry for FAT32). See also Black Hole's Trail Guide (click) which will talk you through the issues. And finally, yet another advertisment for NEW READERS START HERE (click).
3) Once I have an edited recording (non BBCHD) having topped,tailed and removed the adverts in something like VideoRedo or equivalent, is there a way of saving the finished file back to the USB such that I can successfully play it through the Humax box and t.v.?
If you mosey on over to the Custom Software section of the Forum, you will find it is possible to top/tail/remove adverts on the box. QUICK START GUIDE (click)