This looks like a temporary profile issue, where the user's locked out of their normal account by a corrupted user profile. Windows creates a temp account for you (usually with a number starting from 1000).
Samsung 980 Pro 2TB (OS)
Samsung 980 Pro 1TB (Files)
Lexar NZ790 4TB
LaCie d2 Professional 6TB external - USB 3.1
Seagate Expansion 16TB external - USB 3.2
Seagate One Touch 18TB external HD - USB 3.0