stevenz: ADSL2+ upload speeds are always painfully slow. If you need to upload that much data you may need to look into getting VDSL or cable, especially if it's for commercial purposes. I've yet to see an ADSL device get a significantly better upstream speed than around 9000Mbps (a bit over 100Kb/sec)
Their quoted "maximum" is only maximum relative to the capabilities of the format which is a theoretical peak of 1.4Mbps upstream which equates to around 175Kb/sec upload. That's the absolute best theoretical maximum that you could hope for, odds of getting better than 80% of that are pretty much nil due to line loss etc.
Maybe save the files in a lossless format if it wouldn't kill bitdepth etc?
I don't think cable would be an option out here and I doubt VDSL is either.
We are a whole 2.8 kms from the village square but to hear the Post, the electricity company, the courier companies, the phone companies etc you would think we lived in a yurt in Mongolia you could only find with a GPS!!
I can't even pick up Radio New Zealand clearly on an FM radio, much less get cable internet...!