[Q] How to Fix error "md5 mismatch"? - Android Q&A, Help & Troubleshooting

Hello!
I read many post about this error and I tried to do like said here, but I still have the same error.
What I have:
1. Backup path without spaces - /sdcard/clockworkmod/backup/2013-01-05.02.02.02
2. 3 files: boot.img, system.ext4.img and nandroid.md5
3. CWM 5.5.0.4
I tried calculate md5 by TotalCommander, MD5 Calculator and Terminal Emulator. All sums were equals.

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VJVS said:
nandroid.md5
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open nandroid.md5 with root explorer and delete all the contents in it or copy it to another file, than save empty file and try restore.
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I tried. The same error.

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VJVS said:
I tried. The same error.
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are you having the same version of CWM that you initially used to make that backup or has it been changed to another version?
Check this out! You , YES! you are an " Android ". Not your phone but U.
You Must watch this documentary concerning your privacy Terms & Conditions we had agreed to, by using a PC or Smartphone
How to say Thank you? If you find any post helpful on XDA, click on their Thanks button
If you are using XDA App or Tapatalk, long press on the post and select :good: Thanks
Its easier to give "Feedback" in this manner than make an additional post.​

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I don't know about it. This backup from another device (device like mine, but firmware newer). Perhaps it were made by MTK Droid Tools.

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VJVS said:
I don't know about it. This backup from another device (device like mine, but firmware newer). Perhaps it were made by MTK Droid Tools.
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Nandroid backups can only be restored when the CWM used to make them must be of the same version, if you only require certain data or files from it, you can use Nanadroid Browser (download from google play store) to copy them from your backup
Check this out! You , YES! you are an " Android ". Not your phone but U.
You Must watch this documentary concerning your privacy Terms & Conditions we had agreed to, by using a PC or Smartphone
How to say Thank you? If you find any post helpful on XDA, click on their Thanks button
If you are using XDA App or Tapatalk, long press on the post and select :good: Thanks
Its easier to give "Feedback" in this manner than make an additional post.​

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So I can upload boot.img and system.ext4.img to update my device, isn't it?

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VJVS said:
So I can upload boot.img and system.ext4.img to update my device, isn't it?
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Nope, Nandroid browser can allow you to copy paste specific files , provided you are using the same firmware in your phone.
Check this out! You , YES! you are an " Android ". Not your phone but U.
You Must watch this documentary concerning your privacy Terms & Conditions we had agreed to, by using a PC or Smartphone
How to say Thank you? If you find any post helpful on XDA, click on their Thanks button
If you are using XDA App or Tapatalk, long press on the post and select :good: Thanks
Its easier to give "Feedback" in this manner than make an additional post.​

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But how can I update my firmware from this img-files?