Hi
Here is the report of my HDD

It says there are pending sectors ,uncorrectable sectors ,so i wonder how to know which data is corrupted by pending and uncorrectable sectors
from what i know, pending sector is the bad sector that the HDD can not read the data from it and move to another working sector
so i guess maybe there are data in that bad sector (corrupted data)

Purpose
I want to backup my data from that HDD to another HDD ,but i'm not sure if i copy the corrupted data
so i want to find a way to repair all the corrupted files before doing a backup
Question :

1. How to know which files in those pending sector (or how to know which files are corrupted)

2. when I copy data from this HDD to another HDD ,is there any error/warning when copy data from those pending sector (like it takes forever to copy, freezing computer ...) so the user can know that he copy the corrupted data
Thanks alot

There is need to clone your failed drive to another drive. Can use Linux based tools like ddrescue or hddsuperclone. Keep in mind that those tools are limited in how well they can work with your drive. Careful: it is easy to screw up if not familiar with how they work. Suggest practicing first on other drives.
Ideally, you should take it to a data recovery professional who will use hardware imaging tools to create the clone.

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Hard Disk Drive (HDD), Solid State Drive (SSD, SATA, NVMe, etc), USB Flash Drive and RAID Data Recovery Specialist in Massachusetts

especially because this series is very prone to fail and what you see is just the beginning. If u run that drive for a few more hours it will likely to have some nice rings on one of its surfaces (first)...

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Adatmentés - Data recovery