Does anyone know what happens to files that Windows Defender uploads to Microsoft? Once they are scanned are the files archived or possibly (hopefully) deleted?

I have a number of files with some very private information and to make things simpler for family members to access, I used 7-Zip and created an encrypted exe file, with AES 256, and a medium quality password. I just discovered that these files have been uploaded to Microsoft. This all began when Defender flagged a file as "Trojan:Win32/Wacatac.B!ml".

I have now excluded that folder from Defender, and turned off auto submit in security settings, although I thought it was turned off anyway, but perhaps a Microsoft security update turned it back on.