I can Upload those somewhere and if there are any coins send me 90% and keep 10% seems legit
what guarantee those people who downloaded your wallets will send you back 90%, they could just run away
I would prefer watching bitcoin burning than downloading 100+gb of blockchain.
you can use spv wallet such as electrum to do it without downloading full blockchain
are you at least sure those are bitcoin wallets? and can you try check the balance on explorer first?