# Where is 'undo' data stored?
**URL:** https://community.mp3tag.de/t/where-is-undo-data-stored/69239
**Category:** Support
**Created:** [July 24, 2025, 11:55am UTC](https://community.mp3tag.de/t/where-is-undo-data-stored/69239 "2025-07-24T11:55:26Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@dgrainge](https://community.mp3tag.de/u/dgrainge)
#### Post date: [July 24, 2025, 11:55am UTC](https://community.mp3tag.de/t/where-is-undo-data-stored/69239/1 "2025-07-24T11:55:26Z")
At some point, I made a mistake, using convert tag-tag
I intended to replace ALBUM by %\_directory%.
Instead I replaced ARTIST by %\_directory%, and I have destroyed artist data in some 15000 files.
I didn't notice at the time, and made nany changes to titles, composers and filenames.
I want to dig back in time to find the album changes without reversing all the other changes I have since made.
Does anyone have technical information where the 'undo' data is stored? A file? In the registry? I'm happy editing text, freeDB, or registry data ...
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### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [July 24, 2025, 11:58am UTC](https://community.mp3tag.de/t/where-is-undo-data-stored/69239/2 "2025-07-24T11:58:20Z")
> [@dgrainge](#):
>
> Does anyone have technical information where the 'undo' data is stored? A file? In the registry?
AFAIK you can only "undo" the last executed step.
Immediately after you have done a "wrong" step.
You can not go back in time or choose which step you want to undo.
It's just Ctrl+Z or **Edit** -\> **Undo** for the last step.
I don't think the undo data is stored anywhere.
A restart of Mp3tag also prevents **Undo**.
Documentation:
> **[Menu Edit – Mp3tag Documentation](https://docs.mp3tag.de/menus/edit/#undo)**
>
> Menu Edit. Mp3tag is the universal Tag Editor.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [July 24, 2025, 12:01pm UTC](https://community.mp3tag.de/t/where-is-undo-data-stored/69239/3 "2025-07-24T12:01:59Z")
AFAIK any data to fallback with is volatile and only available in the current session.
As soon as you close MP3tag, the undo data is gone.
If you have the artist name somewhere in the path, it should be possible do get it from there.
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### Author:  [@dgrainge](https://community.mp3tag.de/u/dgrainge)
#### Post date: [July 24, 2025, 12:38pm UTC](https://community.mp3tag.de/t/where-is-undo-data-stored/69239/4 "2025-07-24T12:38:32Z")
> [@ohrenkino](#):
>
> s you close MP3tag, the undo data is gone.
I know the data is volatile, and I have left Mptag running. If the data is stored in memory, there's no way to do what I hope for. But if the data is _stored_ somewhere, maybe I can hack it.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [July 24, 2025, 12:42pm UTC](https://community.mp3tag.de/t/where-is-undo-data-stored/69239/5 "2025-07-24T12:42:53Z")
You find the possible undo-able steps in the Edit menu or the toolbar.
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### Author:  [@dgrainge](https://community.mp3tag.de/u/dgrainge)
#### Post date: [July 24, 2025, 12:52pm UTC](https://community.mp3tag.de/t/where-is-undo-data-stored/69239/6 "2025-07-24T12:52:29Z")
I know 🙂 I have attempted this, by using 'undo' repeatedly, but have not found the ALBUM mistake. Maybe I haven't gone back far enough. Maybe Mp3tag continues to offer 'undo' even if it has no effect 😬
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### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [July 24, 2025, 12:53pm UTC](https://community.mp3tag.de/t/where-is-undo-data-stored/69239/7 "2025-07-24T12:53:03Z")
> [@dgrainge](#):
>
> If the data is stored in memory
The data is stored in memory and nowhere else.
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### Author:  [@dgrainge](https://community.mp3tag.de/u/dgrainge)
#### Post date: [July 24, 2025, 12:56pm UTC](https://community.mp3tag.de/t/where-is-undo-data-stored/69239/8 "2025-07-24T12:56:58Z")
> [@Florian](#):
>
> The data is stored in memory and nowhere else.
Thanks for confirming this, Florian.
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [August 23, 2025, 12:57pm UTC](https://community.mp3tag.de/t/where-is-undo-data-stored/69239/9 "2025-08-23T12:57:46Z")
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