In reply to mlt:
Yes, flash memory is as robust as SD. The disadvantage from my point of view would be that you need some mechanism of transferring from one to the other, which means a computer, or similar, in the middle, which then ups the amount you have to carry and the risks of failure, though equally obviously means you have another storage medium (the computer hard drive).
1TB in 32GB SD cards is 32 SD cards. That volume would fit in the size of a mobile phone, hence easier and simpler to carry, especially if you are on the move a lot.