This may be directly related to the latest Drive/Photos update that up to this day wasn't fully rolled out - https://www.blog.google/products/photos/simplifying-google-photos-and-google-drive/
A recommended course of action is to wait a few more days until the update has been completed.
You won't be able to check that anymore because Google Drive And Google Photos stopped being in Sync from July 10 2019. That checkbox is just the front-end residue of the old feature which probably will be removed in the upcoming days.
See Google Announcement: https://support.google.com/photos/answer/9316089
The authuser parameter can take both the number which is used in the /u/ part of the path, or an email address. So, appending this query parameter: firstname.lastname@example.org will make google drive use this account, if it is in the list of signed in accounts.
It's not clear what you mean by "restricted me from viewing my own files" but in any case the first that you should do is to follow the instructions on Make your account more secure.
Disable the file synchronization with your devices.
Check your devices for malware
Try to recover accesible versions of your files. For details checkout View activity &...
I had this exact same issue just happen to me today. I had a 500gb folder of music, family memories etc that kept timing out on me when trying to ZIP.
Not sure if you ever found a solution for it but I'll post a solution here that worked for me for future internet travellers.
Open your Drive account in the web browser. As you said before, the My ...
By default sharing a folder in Google Drive (in your case "Big Folder") - any file or folder inside it (in your case "Small Folder") is shared with the same people.
Therefore, if you have not changed settings, everything you move from "Big Folder" to "Small Folder" will be shared the same. And no one will lose access.
But if you have changed the sharing ...