There are two main types of recycle bin visible to users of the Workbench when logged into a QIAGEN CLC Genomics Server:

• recycle bins in the Workbench data locations 

• recycle bins in the Genomics Server file locations 

Each top level folder that one can see via the Workbench is a "location" of some sort - the ones with blue dots on them are Server file locations. The others are Workbench data locations. Every location has a single recycle bin.
 

Please find the specifics on how to empty QIAGEN CLC Genomics Server recycle bins either via the QIAGEN CLC Genomics Workbench or the Genomics Server administrative interface as well as how to setup an automatic cleanup on the following manual page: 
https://resources.qiagenbioinformatics.com/manuals/clcserver/current/admin/index.php?manual=Recycle_bins.html