You can use RescueZilla which has a built-in GUI for Filezilla along with a file browser as long as you do NOT compress the backup image.
RescueZilla Tags - https://github.com/rescuezilla/rescuezilla/tags
RescueZilla Download - https://rescuezilla.com/download.html
Video at: http://youtu.be/OwZ-98KkZs4
Requirement
sudo apt install partclone
Create File to Hold ISO
mkdir /media/mruckman/RUCKMANS-4T/ISO
touch /media/mruckman/RUCKMANS-4T/ISO/IDEAPAD330.ISO
The following wild card names might be slightly different depending on your backup
sudo cat /media/mruckman/RUCKMANS-4T/2021-07-07-01-img/sda2.ext4-ptcl-img.gz.* | sudo gzip -d -c | sudo partclone.restore -C -s - -O /media/mruckman/RUCKMANS-4T/ISO/IDEAPAD330.ISO
Now to Finish Preparing the ISO Image
cd /media/mruckman/RUCKMANS-4T/ISO
# Answer Yes when prompted to Abort
e2fsck -f IDEAPAD330.ISO
resize2fs -f IDEAPAD330.ISO
Mount the Image in Read-Only to Retrieve Files. When mounted, it's read-only and can be found /mnt
Note: Mount Utility only seems to work on local drive and NOT external drive
sudo mount -o loop -t ext4 /media/mruckman/RUCKMANS-4T/ISO/IDEAPAD330.ISO /mnt
Unmount the ISO Image
sudo umount /mnt
