To determine where your DS Content Library is located, open DS and navigate to your Content Library tab as illustrated below.  If you haven't rearranged the UI from its default settings, at the top of the left-hand column you will find the DAZ Studio Formats.  There may or may not be a list of Library folder selections, hover your mouse cursor the Library name and you should get a popup banner with the location of that Library Folder.  I am working off of Windows 11, but the software should be identical.