# External HD error

**URL:** <https://forums.sandisk.com/t/external-hd-error/386471>\
**Category:** External SSD for Windows\
**Created:** [August 31, 2017, 10:14pm UTC](https://forums.sandisk.com/t/external-hd-error/386471 "2017-08-31T22:14:29Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![larryv8](https://avatars.discourse-cdn.com/v4/letter/l/90db22/32.png) [@larryv8](https://forums.sandisk.com/u/larryv8)\
**Post date:** [August 31, 2017, 10:14pm UTC](https://forums.sandisk.com/t/external-hd-error/386471/1 "2017-08-31T22:14:29Z")

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Error: “This disk structure is corrupted and unreadable.” The fix?

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**Author:** ![alex.s](https://avatars.discourse-cdn.com/v4/letter/a/d9b06d/32.png) [@alex.s](https://forums.sandisk.com/u/alex.s)\
**Post date:** [September 1, 2017, 5:50pm UTC](https://forums.sandisk.com/t/external-hd-error/386471/2 "2017-09-01T17:50:34Z")

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Hi larryv8 ,

It seems like the drive is corrupted, so you should format the drive and make sure you have data backed up at some other location. As formatting is data destructive process.

Thanks!

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**Author:** ![larryv8](https://avatars.discourse-cdn.com/v4/letter/l/90db22/32.png) [@larryv8](https://forums.sandisk.com/u/larryv8)\
**Post date:** [September 1, 2017, 6:49pm UTC](https://forums.sandisk.com/t/external-hd-error/386471/3 "2017-09-01T18:49:53Z")

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How can I back up the data if I am unable to access the drive?

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**Author:** ![larryv8](https://avatars.discourse-cdn.com/v4/letter/l/90db22/32.png) [@larryv8](https://forums.sandisk.com/u/larryv8)\
**Post date:** [September 1, 2017, 7:25pm UTC](https://forums.sandisk.com/t/external-hd-error/386471/4 "2017-09-01T19:25:29Z")

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I tried to sign in again, but it said I have no account at this address.  
???