# Incompatibility of Library and Preserve file modification time options

**URL:** <https://community.mp3tag.de/t/incompatibility-of-library-and-preserve-file-modification-time-options/60275>\
**Category:** Support\
**Created:** [March 5, 2023, 2:08pm UTC](https://community.mp3tag.de/t/incompatibility-of-library-and-preserve-file-modification-time-options/60275 "2023-03-05T14:08:17Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![LyricsLover](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/l/c6cbf5/32.png) [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)\
**Post date:** [March 5, 2023, 3:37pm UTC](https://community.mp3tag.de/t/incompatibility-of-library-and-preserve-file-modification-time-options/60275/2 "2023-03-05T15:37:32Z")

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Are these answers a valid confirmation?

> [@Library - force rebuild](https://community.mp3tag.de/t/library-force-rebuild/19755/2):
>
> You have to refresh thefile-view of the loaded files. MP3Tag does not refresh them "on the fly". That has nothing to do with the library. The library only gets updated during refresh or new load if the timestamp has changed.

including the one from Florian:

> [@Library - force rebuild](https://community.mp3tag.de/t/library-force-rebuild/19755/5):
>
> Just for completeness: you can also select all relevant files files and use "File \> Read Tag" or [Ctrl+T] to refresh the library data from the file system.

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_[View the full topic](https://community.mp3tag.de/t/incompatibility-of-library-and-preserve-file-modification-time-options/60275)._