Ftp isos using ethernet, savedata folder on root of dev_hdd0 is your memory cards for ps1 and 2, rebuild the database after injecting them since they're indexed, backup the home directory to have licenses, trophies, and saves, redownload the package games and reinstall. Don't use the official backup and restore option as it doesn't include trophies, copywritten saves, and it will take like 50 hours. To keep cfw, just reinstall the same cfw you had on to the new drive. I don't think that's necessary on older phats, nand consoles.