I had this problem too after upgrading. I found that deleting my SMB keychain entries solved it allowed me to login again (after getting my admin to unlock my account from all those failed attempts).
Hard drives are so cheap these days, the only real viable way to back them up is on more hard drives. Simply use external drives that you can power off, or setup a RAID configuration. Cheap, easy, and fast.
I had this problem too after upgrading. I found that deleting my SMB keychain entries solved it allowed me to login again (after getting my admin to unlock my account from all those failed attempts).
Hard drives are so cheap these days, the only real viable way to back them up is on more hard drives. Simply use external drives that you can power off, or setup a RAID configuration. Cheap, easy, and fast.