i installed xarchiver on ubuntu & tried extracting the 2 files in the links posted above by me but the results were exactly the same as with file-roller.
i thought maybe the source files in the above links from hard disk sentinel are corrupted so i downloaded both the above mentioned files on a windows computer & tried extracting them with 7zip. the results were flawless, the extraction was successful & the contents worked perfectly.
bottom line, both gnome archive manager / file-roller & xarchiver failed to extract the above mentioned .gz files on ubuntu 20.04.2
update :
i installed xarchiver on ubuntu & tried extracting the 2 files in the links posted above by me but the results were exactly the same as with file-roller.
i thought maybe the source files in the above links from hard disk sentinel are corrupted so i downloaded both the above mentioned files on a windows computer & tried extracting them with 7zip. the results were flawless, the extraction was successful & the contents worked perfectly.
bottom line, both gnome archive manager / file-roller & xarchiver failed to extract the above mentioned .gz files on ubuntu 20.04.2
waiting in anticipation for a resolution.