/dev/sda4 492G 467G 90M 100% /
Your drive is completely full according to both bitcoind and your filesystem.
I'd recommend trying to move off something before the next shutdown and restart so it doesn't start up and run extremely slowly - depending on the os - (normally about 1GB is enough).
The current blockchain size is 402.55 GB for Apr 25 2022
https://ycharts.com/indicators/bitcoin_blockchain_sizeOp should have some extra files than the bitcoin node on that disk, move them to a USB or external drive and it should work fine.
And I would recommend a bigger disk, at least 1TB to avoid this kind of problems. The blockchain is growing up fast.