I have a ton of Google spreadsheets I want to move to another Google Drive account. I ignorantly downloaded them all, forgetting that Drive converts .gsheet to .xlsx when you download. That means spreadsheets with UDFs, attached forms, or non-Excel functions are mostly changed beyond usability.
As far as I've been able to see, the simplest solution will be to share all the files I want to move with destination Account B, then make copies there, which will be owned by Account B. But this feels like a big kludge. Is there a better way?