Need advice for PCB replacement

let me ask you for some advice

because I am having a problem with a Toshiba Canvio Basics 2TB (HDTB320EK3CA) hard drive.

The pcb reference is: PCB TOSHIBA G4330A

Before ordering the PCB I wanted to ask you by sending you a photo if there was on this type of PCB, a single component

or more to change on the motherboard.

Indeed I know that there is the eight-legged component but is there another one?

moreover can you tell me the type of hot air gun that should be used so as not to unsolder the other components of the card at the same time. I send you a photo of the PCB because I really need to save my external hard drive. Thank you for your help.

About BIOS, please refer the attached photo.

You can move the BIOS from your original PCB by using hot-air gun, then soldered it on the replacement board. Please refer: https://www.hddzone.com/hard_drive_pcb_firmware_transfer.html.  Or you can find an electronics repair shop help you.

Good morning ,

I have one more thing to ask you,

the pcb card must it come from a hard disk of the same

capacity is 2tb for me or not necessarily? THANKS

Just check the board number is ok.  If it needs to check other info, we will let you know.