Your Library is the home for all your purchased Songs and Sounds. When browsing Tracklib, either from your web browser or from the Desktop App, you can chose if you want to save the audio file directly, or simply add a Song or Sound to Your Library and then download or sync them later. 

When logged in via your web browser, you now have two options when purchasing Songs or Sounds.

• Click the arrow icon to download the file immediately to your browsers download folder. It will automatically be added to your library as well, allowing you to download it again in the future, or sync with the Desktop App.
• Click the plus icon to Add to Library only. You can then download or sync it from Your Library whenever you like. 

When logged in to the Desktop App, you can either Sync or Add to Library.

• Sync will sync the Song or Sound locally to your download folder. This allows you to drag and drop the file or open it directly in your DAW. It will also automatically be added to Your Library.
• Click Add to Library if you want to download or sync the file later.

If when browsing, you see a check mark instead of the plus icon, this means the Song or Sound is already added to Your Library.

Whether you Download, Sync or Add to Library only, these are all considered purchases and therefore require credits. You only ever pay once though, so you will always be able to download or sync it again without the need to use any further credits.