# Library is empty **URL:** https://community.mp3tag.de/t/library-is-empty/41015 **Category:** Support **Created:** [March 10, 2018, 4:55pm UTC](https://community.mp3tag.de/t/library-is-empty/41015 "2018-03-10T16:55:23Z") **Posts on this page:** 1 **Showing post:** 12
### 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: [May 25, 2020, 12:45pm UTC](https://community.mp3tag.de/t/library-is-empty/41015/12 "2020-05-25T12:45:42Z")
> [@Moonray](#): > > library" caching option is useful with a fast SSD, and useless with slow connection You don't seem to read all that is in the posts. The main purpose is to be able to read the files from large collections. Without the library, you can read some 50,000 files before you run into memory trouble. That you also gain some speed depending on your system setup is a nice by-product. See this topic on where to look for MP3tag files: > [@Installation & Backup](https://community.mp3tag.de/t/installation-backup/964/4): > > Cannot write configuration file If you're getting the error message Cannot write configuration file when closing Mp3tag, it's most likely a file permissions issue. This can happen if you recently updated your Windows version or moved data from one computer to another. In this case, the file permissions sometimes reference Windows user accounts that do not exist on the updated computer or are not the one which you're currently using. To resolve this, the file permissions need to be adjusted. Ho… --- _[View the full topic](https://community.mp3tag.de/t/library-is-empty/41015)._