Hmmm ..., "1 to 2 terabytes", let's call it 1.5 terabyes and do some math. You'd need about 50 of those 32Gb memory cards. The cheap and slow ones run about $20 each here in the US. So we're already at $1000 for the memory cards.

I guess it would work if you were OK with doing it sequentially in small chunks, one memory card at a time. Assuming a 4 day turnaround to mail the card and then have it mailed back, we're talking about 200 days to complete the task.

I think I would just buy one big hard drive myself, load it up with the complete 1-2 terabyte backup, and then ship it. You can buy a 1.5 terabyte oem drive for much less than $100 these days. Then maybe $7 to mail it and another $2 to buy good quality packing materials to assure it gets to its destination in tip-top shape. Add another $1 for insurance so the post office would replace the hard drive if they lost or broke it.