# Action "Replace"
**URL:** https://community.mp3tag.de/t/action-replace/2064
**Category:** Off-Topic
**Created:** [June 21, 2005, 1:57pm UTC](https://community.mp3tag.de/t/action-replace/2064 "2005-06-21T13:57:55Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@larx](https://community.mp3tag.de/u/larx)
#### Post date: [June 21, 2005, 1:57pm UTC](https://community.mp3tag.de/t/action-replace/2064/1 "2005-06-21T13:57:55Z")
I used action "replace" \_filename containing "3", now all my MP3-s are gone from this program sine I do not have any MP3-files any more. Of course they are in my folder but they all misses "3" in extension \*.mp3, Anyone with a bright idea how to fix this? Thanks.
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### Author:  [@Sebastian\_Mares](https://community.mp3tag.de/u/Sebastian_Mares)
#### Post date: [June 21, 2005, 3:42pm UTC](https://community.mp3tag.de/t/action-replace/2064/2 "2005-06-21T15:42:30Z")
> [@](#):
>
> I used action "replace" \_filename containing "3", now all my MP3-s are gone from this program sine I do not have any MP3-files any more. Of course they are in my folder but they all misses "3" in extension \*.mp3, Anyone with a bright idea how to fix this? Thanks.
>
> \<{POST\_SNAPBACK}\>
How about replacing ".mp" with ".mp3"? 😃
Try doing a "rename \*.mp \*.mp3" in command prompt.
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### Author:  [@larx](https://community.mp3tag.de/u/larx)
#### Post date: [June 21, 2005, 4:18pm UTC](https://community.mp3tag.de/t/action-replace/2064/3 "2005-06-21T16:18:11Z")
I know this command. My problem is that in "my music" folder, I have very manu folders, in each folder it is very many mp3-files (about 4000). So renaming in command prompt is a very big job. Is there a action is this software that can add "3", like songname.mp to songname.mp **3**
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### Author:  [@Sebastian\_Mares](https://community.mp3tag.de/u/Sebastian_Mares)
#### Post date: [June 21, 2005, 5:29pm UTC](https://community.mp3tag.de/t/action-replace/2064/4 "2005-06-21T17:29:43Z")
> [@](#):
>
> I know this command. My problem is that in "my music" folder, I have very manu folders, in each folder it is very many mp3-files (about 4000). So renaming in command prompt is a very big job. Is there a action is this software that can add "3", like songname.mp to songname.mp **3**
>
> \<{POST\_SNAPBACK}\>
Did you close MP3Tag in the meanwhile? If not, you can use Undo. 😛
I am thinking how to achieve the renaming using a batch file... Stay tuned.
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### Author:  [@Sebastian\_Mares](https://community.mp3tag.de/u/Sebastian_Mares)
#### Post date: [June 21, 2005, 5:40pm UTC](https://community.mp3tag.de/t/action-replace/2064/5 "2005-06-21T17:40:31Z")
Download [Case's "Sweep"](http://www.saunalahti.fi/cse/files/Sweep.zip) and use the following at the command prompt ("sweep.exe" should be in the root folder where all subfolders containing your music are stored):
_sweep ren \*.mp \*.mp3_
I will also move this to Off-Topic.
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### Author:  [@larx](https://community.mp3tag.de/u/larx)
#### Post date: [June 21, 2005, 6:23pm UTC](https://community.mp3tag.de/t/action-replace/2064/6 "2005-06-21T18:23:07Z")
Thanks. Worked fine. Now all mine 4788 MP3's are back to normal, also done a backup of 30Gb.