# Help with smart truncating of long filenames **URL:** https://community.mp3tag.de/t/help-with-smart-truncating-of-long-filenames/16455 **Category:** Support **Created:** [December 31, 2014, 1:40pm UTC](https://community.mp3tag.de/t/help-with-smart-truncating-of-long-filenames/16455 "2014-12-31T13:40:25Z") **Posts on this page:** 1 **Showing post:** 8
### Author: ![DetlevD](https://community.mp3tag.de/user_avatar/community.mp3tag.de/detlevd/32/123_2.png) [@DetlevD](https://community.mp3tag.de/u/DetlevD) #### Post date: [December 31, 2014, 4:20pm UTC](https://community.mp3tag.de/t/help-with-smart-truncating-of-long-filenames/16455/8 "2014-12-31T16:20:13Z")
**259 characters max. length for a filepathname in a subfolder of a disk.** For extension '.flac' ... 254 characters max. length of filepathname without extension. For extension '.mp3' ... 255 characters max. length of filepathname without extension. Action : Format value Tag-Field : `_FILENAME` Formatstring: ```auto $ifgreater($len(%_folderpath%$if2(%ALBUMARTIST%,%ARTIST%)[' - '%ALBUM%][' - '$num(%TRACK%,2)]' - '$if2(%TITLE%,'(Untitled)')),$sub(259,1,$len(%_extension%)),$regexp($left(%_folderpath%$if2(%ALBUMARTIST%,%ARTIST%)[' - '%ALBUM%][' - '$num(%TRACK%,2)]' - '$if2(%TITLE%,'(Untitled)'),$sub(259,2,$len(%_extension%))),'\s+$',)'…',%_folderpath%$if2(%ALBUMARTIST%,%ARTIST%)[' - '%ALBUM%][' - '$num(%TRACK%,2)]' - '$if2(%TITLE%,'(Untitled)')) ``` ... or written into two steps ... Action : Format value Tag-Field : `TMP_FILENAME` Formatstring: ```auto %_folderpath%$if2(%ALBUMARTIST%,%ARTIST%)[' - '%ALBUM%][' - '$num(%TRACK%,2)]' - '$if2(%TITLE%,'(Untitled)') ``` Action : Format value Tag-Field : `_FILENAME` Formatstring: ```auto $ifgreater($len(%TMP_FILENAME%),$sub(259,1,$len(%_extension%)),$regexp($left(%TMP_FILENAME%,$sub(259,2,$len(%_extension%))),'\s+$',)'…',%TMP_FILENAME%) ``` DD.20141231.1828.CET, DD.20150311.1024.CET, DD.20150320.1049.CET --- _[View the full topic](https://community.mp3tag.de/t/help-with-smart-truncating-of-long-filenames/16455)._