Trouble backing up with rescuezilla: filesystem has errors issue

Ok, how to repair errors on /dev/sdb4 so I can backup (sdb4 it’s the home folder)?? Info and fsck output before ( there is an "ignore filesystem errors’ option but this wouldn’t be good option right!?) :

Disk /dev/sdb: 894.25 GiB, 960197124096 bytes, 1875385008 sectors
Disk model: KINGSTON SA400S3
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 47C32C96-7790-4310-A8C0-CC138AA8E0FA

Device         Start        End    Sectors   Size Type
/dev/sdb1       2048       4095       2048     1M BIOS boot
/dev/sdb2       4096    2101247    2097152     1G Linux filesystem
/dev/sdb3    2101248  148901887  146800640    70G Linux filesystem
/dev/sdb4  148901888 1875384319 1726482432 823.3G Linux filesystem
sudo fsck -y /dev/sdb4
fsck from util-linux 2.37.2
e2fsck 1.46.5 (30-Dec-2021)
/dev/sdb4 has unsupported feature(s): FEATURE_C12
e2fsck: Get a newer version of e2fsck!

/dev/sdb4: ********** WARNING: Filesystem still has errors **********"

Do you happen to have a cheapo/dumpster Drive laying around, that you could clone this to?

I always like to do that before I make backups after errors or need to run badblocks or other filesystem tools.

I should have enough space to backup my home partition files to the drive I use for rescuezilla

Ok, What filesystem is this you are using? BTRFS has some built-in tools for you to help with the error corrections. If you are using a different File system there are different tools for that.

Ext4 home partition

Added ext4, filesystem

Any suggestions??