Edited : with GetDataBack, I see the deleted file, but size is 0 and it seems unrecoverable.
Hmm, you're right. The files I originally recovered were all below 4GB but I would have thought they'd realise that NTFS could have over a 4GB filesize.
I just tested a ~6.5GB ISO on a external 640GB USB3 drive, same result as you - it was recovered with 0 filesize.
I'm now trying it with the Systemic file system damage option...this will take a while, ~1.5 hours, but hopefully it will trace through the linking in the file blocks and come up with something - I'll let you know in a couple of hours.
One other factor, (may be relevant, may not), my original recovery was using an internal SATA connected drive. I might see if that makes a difference.
Re: R-Studio, I can't comment on how effective it will be since I don't own it but maybe it would be a good idea to email them first, (and Runtime Systems also), asking specifically whether their software will recover a deleted 8GB file and
whether they'll refund your money if it proves not to - at least that way you'll have an 'in writing' response from the company if it doesn't work. Though some companies can still be a.......s about these things.
Addendum: A little searching turned up a couple of items, this post
on the Sysinternals forum and this question
on Superuser which pointed to it, (answer 2 used PhotoRec for a 4GB recovery - who knows, it might be able to do the job).
Short of it is, if the file's fragmented you might not be very lucky and with a multi-GB file this is probably going to be truer more often than not.
A suggestion, some DVB recording programs allow for the cutting of the recording into 1 or 2GB blocks, (to compensate for FAT limits), perhaps your software can do the same - this should make any accidental deletion a lot more recoverable.ADDENDUM 2:
You'll have to strike GetDataBack off your list, I couldn't even find the deleted 6.5GB file after its rather exhaustive analysis search of the filesystem. That kind of restricts it to 4GB max I guess.