I Won Auction: Cool Gadgets & Heaps of Tangled, Mismatched Cords

Since moving to Oregon I have longed for the helpful, competent fixer-folks that were in every other open-garage back home. Most have no interest in repair here, others overstate their skills and just brutishly destroy things. Mostly my things. That's not me. My father built and repaired everything and showed me how as he worked. So, I do fix things, however my confidence in electronic repair is timid. I feel I'm a capable, careful, manual reading, proper-tool using gal that respects the directions. I would have been content reading and learning from @oldturkey03's contributions all weekend. My point is, I don't know everything but I can repair things. Having said all that, the tangled nest of the cables here cannot be overstated. I may eventually tease out the matching power cords but I have other things to do and it's my birthday weekend!

Key Problem: I need to download 1.5 Tb of data from a paid data storaGe service to an external drive from the auction before I'm charged another year's subscription fee on Monday.

Question: Can one successfully cut the device plug from the main housing of a 12v power adapter and attach a device plug that seemingly fits? I have a new looking LACie Minimus with no writing at all other than "LACie". No amperage printed either but @oldturkey03 and I believe it to be 5v 2A. What say you? Can it be done without zapping the drive? I don't want to wait and be charged, I also don't want to destroy it if its just impossible. I need to know, given what I've shared, is it possible? And how,, I need that too, lol. Instruction and encouragement is always appreciated. Thank you!