# Copying MP3 files to device **URL:** \ **Category:** Support\ **Created:** [June 5, 2020, 9:29am UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205 "2020-06-05T09:29:45Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![kohck](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/k/9fc348/32.png) [@kohck](https://community.mp3tag.de/u/kohck)\ **Post date:** [June 5, 2020, 9:29am UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/1 "2020-06-05T09:29:45Z")
I am trying to copy 30 mp3 files from my pc to a mp3 player. While I managed to put their # from 1 to 30 on my pc, once I copied to the MicroSD card, the numbers got mess up. the number that I pressed does not call up the track that I expect. Can someone help me? Thanks! ---
**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\ **Post date:** [June 5, 2020, 9:36am UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/2 "2020-06-05T09:36:28Z")
You need to find out what the player reads (just the filename or really the metadata?), which tag versions it understands (v1, v2.3, v2.4?) Which tag fields are filled besides the track number (which I hope is what you mean when you wrote > [@kohck](#): > > I managed to put their # from 1 to 30 on my pc,) ---
**Author:** ![kohck](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/k/9fc348/32.png) [@kohck](https://community.mp3tag.de/u/kohck)\ **Post date:** [June 5, 2020, 9:42am UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/3 "2020-06-05T09:42:30Z")
oh wow, may i know how to find out what the player reads? ---
**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\ **Post date:** [June 5, 2020, 9:49am UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/4 "2020-06-05T09:49:21Z")
Well, you could modify a filename and see where it appears in the list. And you could do the same with the metadata in a file. Like adding all the usual tag fields ALBUMARTIST, ARTIST, ALBUM, TITLE, TRACK and then check again. ---
**Author:** ![kohck](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/k/9fc348/32.png) [@kohck](https://community.mp3tag.de/u/kohck)\ **Post date:** [June 5, 2020, 10:27am UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/5 "2020-06-05T10:27:20Z")
thanks for your advice ---
**Author:** ![kohck](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/k/9fc348/32.png) [@kohck](https://community.mp3tag.de/u/kohck)\ **Post date:** [June 5, 2020, 10:31am UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/6 "2020-06-05T10:31:30Z")
there is one thing very strange. When I added tracks to all the 30 files, the track number stays when I copied the files to a microSD card. But after I eject it, the track numbers are gone. ---
**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\ **Post date:** [June 5, 2020, 1:49pm UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/7 "2020-06-05T13:49:48Z")
You eject the card from the PC card reader and the track numbers are gone? This does not make sense. It would now be helpful if you could tell us how you added track numbers to the files' metadata. Then, a screenshot of the extended tags would be nice (Alt-t) or alternatively of the MP3tag files list with as many columns visible as possible. ---
**Author:** ![kohck](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/k/9fc348/32.png) [@kohck](https://community.mp3tag.de/u/kohck)\ **Post date:** [June 6, 2020, 6:21am UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/8 "2020-06-06T06:21:23Z")
![Screenshot 2020-06-06 14.18.27](https://community.mp3tag.de/uploads/default/original/2X/b/ba6d9eac7c6a326028b4a4963a3ec399d219c6d5.png) I had the files tracked from 1 to 28. then I moved the files by MP3Tag to my usb drive. i checked the usb drive under windows explorer, ![Screenshot 2020-06-06 14.19.31](https://community.mp3tag.de/uploads/default/original/2X/e/e22b7e892f183f502a452e54cb9694a5093973e9.png) 4 of the files that had track number 21 to 24 had their track number erased. I haven't even ejected the USB yet. ---
**Author:** ![kohck](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/k/9fc348/32.png) [@kohck](https://community.mp3tag.de/u/kohck)\ **Post date:** [June 6, 2020, 7:09am UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/9 "2020-06-06T07:09:23Z")
The thing is, I added files to MP3tag, then I use auto numbering to add track numbers. but the track numbers doesn't seem to stay with everyfile when I copied to other media, USB or microSD ---
**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\ **Post date:** [June 6, 2020, 7:32am UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/10 "2020-06-06T07:32:06Z")
Now we are getting on: this means there are some files that behave in a strange way. I would suggest that you check the files with the utilities linked in this thread: > [@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 … ---
**Author:** ![system](https://community.mp3tag.de/uploads/default/original/2X/c/ce7035d426cb755a7916793326d23b465222a407.png) [@system](https://community.mp3tag.de/u/system)\ **Post date:** [February 9, 2026, 12:28pm UTC](https://community.mp3tag.de/t/copying-mp3-files-to-device/49205/11 "2026-02-09T12:28:37Z")