What to backup on blockproducer node?

I have some problems on my blockproducer node and need to format it. I have setup pool following coincashew instructions. I can still login to server in recovery mode and acces my files. My question is what to save from server, only “cardano_my_node” folder where i have pool.cert stake.cert and so on ?

First yes save the wallet and pool files then for a faster sync u can save the bin folder where the binari files are ( /usr/local/bin) + the db folder (the blockchain)

Thanks. What can go wrong here, what files are critical, i dont want to loose something?

Wallet files (payment.addr, payment.skey/vkey, stake.skey/vkey) and the pool files (cold keys, etc)