# File permission error when writing tags to FAT partition

**URL:** <https://community.mp3tag.de/t/file-permission-error-when-writing-tags-to-fat-partition/52283>\
**Category:** Mac\
**Tags:** bug-fixed\
**Created:** [March 7, 2021, 11:26pm UTC](https://community.mp3tag.de/t/file-permission-error-when-writing-tags-to-fat-partition/52283 "2021-03-07T23:26:50Z")\
**Posts on this page:** 2\
**Page:** 2

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**Author:** ![Florian](https://community.mp3tag.de/user_avatar/community.mp3tag.de/florian/32/5759_2.png) [@Florian](https://community.mp3tag.de/u/Florian)\
**Post date:** [June 4, 2021, 9:43am UTC](https://community.mp3tag.de/t/file-permission-error-when-writing-tags-to-fat-partition/52283/22 "2021-06-04T09:43:42Z")

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The file has a truncated RIFF chunk — an element which reports a different size than its actual size. Mp3tag refuses to write to such files to prevent creating even more damage.

I'll need to improve the error message to make this clearer.

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<div class="post-metadata">

**Author:** ![system](https://community.mp3tag.de/uploads/default/original/2X/c/ce7035d426cb755a7916793326d23b465222a407.png) [@system](https://community.mp3tag.de/u/system)\
**Post date:** [April 21, 2022, 8:07am UTC](https://community.mp3tag.de/t/file-permission-error-when-writing-tags-to-fat-partition/52283/23 "2022-04-21T08:07:43Z")

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