2 TB external HD does not mount any more. How to save it's data?

[Bas G. Roufs]

Hello Everybody.

A few years ago, I formatted a 2 TB Western Digital external hard disk formatted into ext4.  
Ever since then, I have been using it to backup my data. However, ever since a few months, the 
device is becoming less functional. Now, I do not any more manage to mount it.  On the other 
hand, the device still does show up via lsusb and GParted. The latter packages mentions 'input-
output errors' and only sees an 'unallocated' space. 

It is crystal clear to me that the device needs to be reformatted in order to get it functional 
again. However, I first need to recover the data. How best to do so?

Thanks, respectfully yours,
Bas G. Roufs. -- 

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*/Bas G. Roufs/*
Utrecht, NL, EU.
E.: bas at basroufs.eu, M./SMS: +31 6 446 835 10.
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