If it’s out of the blue my guess would be one of the SSDs is failing.
You’ve done a health check on them?
For reference I always split duties across multiple drives (system, documents, games etc) I keep system backups on the documents drive and I have On Event backups for all drives when I plug in my external HDD.
My advice would be if you don’t have a robust backup system in place then secure crucial data immediately regardless of what the issue turns out to be. If you have already, then I’ll be quiet
You’ve done a health check on them?
For reference I always split duties across multiple drives (system, documents, games etc) I keep system backups on the documents drive and I have On Event backups for all drives when I plug in my external HDD.
My advice would be if you don’t have a robust backup system in place then secure crucial data immediately regardless of what the issue turns out to be. If you have already, then I’ll be quiet