I bought my book essential 2Tb about a year ago from Kabul city - Afghanistan. I copied all my data and worked perfectly and I registered it to WD and used the software for locking. after a few months of using, it became too slow when I use it. after a few days I can not access the drive. when I am entering the password, it is written ( no Writable WD smartware partition found). and also in my WD account is written out of Region I did the following things:
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changed the USB cable, the Power Cable
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download Smartware from WD site
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used another computer for accessing