# Mp3 file does not have a Comments field; it is not modifiable in mp3Tag, either
**URL:** https://community.mp3tag.de/t/mp3-file-does-not-have-a-comments-field-it-is-not-modifiable-in-mp3tag-either/61471
**Category:** Support
**Created:** [July 4, 2023, 8:01pm UTC](https://community.mp3tag.de/t/mp3-file-does-not-have-a-comments-field-it-is-not-modifiable-in-mp3tag-either/61471 "2023-07-04T20:01:05Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@MargaretBartley](https://community.mp3tag.de/u/MargaretBartley)
#### Post date: [July 4, 2023, 8:01pm UTC](https://community.mp3tag.de/t/mp3-file-does-not-have-a-comments-field-it-is-not-modifiable-in-mp3tag-either/61471/1 "2023-07-04T20:01:05Z")
I downloaded an mp3 file from Briteon. I'm using Windows 8.1.
When I opened the Properties of the file in File Explorer, there was no Comments field.
When I opened the file in mp3Tag, I was able to enter the URL that was the source of the file in the Comments field on the left pane, but the Save button was inactive - both the button, and the Save menu item, so I could not put the Comments data in the file using mp3Tag, either.
Do I need to convert the file to another format?
If so, which one, and how do I do that?
Thanks
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### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [July 4, 2023, 8:12pm UTC](https://community.mp3tag.de/t/mp3-file-does-not-have-a-comments-field-it-is-not-modifiable-in-mp3tag-either/61471/2 "2023-07-04T20:12:58Z")
Before you try to convert your mp3 into another format, please check your mp3 file, if it is valid and has no errors.
(The file may play correctly but this is not an indicator of whether the file structure is valid or not.)
You will find some check-tools here:
> [@How to check files for errors?](https://community.mp3tag.de/t/how-to-check-files-for-errors/44633):
>
> It’s required and often helps to reduce support cycles to check files for errors before filing a bug report. Symptoms of erroneous files are often missing or wrong bitrate or length audible blips or skips tags seem to be sticky and cannot be removed There are some really good tools to check the files for errors, namely MP3 Diags — identifies many different issues in MP3 files Website: [http://mp3diags.sourceforge.net](http://mp3diags.sourceforge.net) Download: [MP3 Diags - Getting MP3 Diags](http://mp3diags.sourceforge.net/010_getting_the_program.html#binWindows) If the font size in MP3 Diags is …
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### Author:  [@MargaretBartley](https://community.mp3tag.de/u/MargaretBartley)
#### Post date: [July 4, 2023, 8:37pm UTC](https://community.mp3tag.de/t/mp3-file-does-not-have-a-comments-field-it-is-not-modifiable-in-mp3tag-either/61471/3 "2023-07-04T20:37:19Z")
You are right. I didn't even notice that it's an .aac file, not an .mp3 file. VLC took care of it for me.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [July 5, 2023, 5:17am UTC](https://community.mp3tag.de/t/mp3-file-does-not-have-a-comments-field-it-is-not-modifiable-in-mp3tag-either/61471/4 "2023-07-05T05:17:47Z")
See e.g. this thread on AAC files:
> [@MP3tag v2.51 doesn't change any .AAC tag field. Why?](https://community.mp3tag.de/t/mp3tag-v2-51-doesnt-change-any-aac-tag-field-why/13507):
>
> When something is put in any .AAC field or deleted from it, nothing appears or remains old text. It seems, that MP3tag is not working with AAC. MP3tag just can delete AAC's tags... Could anyone help me? Thanks wink
or here:
> [@\[X\] Can't add Artwork for AAC files](https://community.mp3tag.de/t/x-cant-add-artwork-for-aac-files/41214):
>
> Can't add Artwork for AAC files from Artwork preview (Right click -\> "Add cover"... is disabled). When using "Tag sources" to fetch an Artwork for An AAC file it's not saved. But it works with drag-n-drop to the Artwork preview! Version 2.86
So I wonder what VLC did for you.
Save the info in its own database?
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### Author:  [@MargaretBartley](https://community.mp3tag.de/u/MargaretBartley)
#### Post date: [July 5, 2023, 5:46am UTC](https://community.mp3tag.de/t/mp3-file-does-not-have-a-comments-field-it-is-not-modifiable-in-mp3tag-either/61471/5 "2023-07-05T05:46:29Z")
I used VLC to convert my .aac file to .mp3 file.
Then it has all the mp3 tags you would expect.
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [August 4, 2023, 5:18am UTC](https://community.mp3tag.de/t/mp3-file-does-not-have-a-comments-field-it-is-not-modifiable-in-mp3tag-either/61471/6 "2023-08-04T05:18:10Z")
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