I'll double check in the morning and post back with final confirmation, but I think 2Tb is within any upper limit on partition sizes (hmm, found reports of 1Tb on some Android tablets, I'll wait to hear back from the office tomorrow). I've currently got a 60Gb SSD sitting in mine, and the largest single drive I have is 1Tb.
Just one thing to remember - the drive needs to be a 2.5" (or smaller if it still has the fixing holes in the same place?), so make sure your current 2Tb is NOT the full-sized 3.5" desktop PC-type drive.