Disappearing documents and granting strangers access – Google Sheets Review

So this is the second thing time something major has happened. It requires hours of work to undo the random loss of documents with no file history, just gone. Also it has a weird history of letting outside parties view our sheets for private transportation, it includes clients names and phone numbers and here we have random people that compromise it. We can never get an answer as to why, just that it is.
Review by Jettylee bit on Google Sheets.