I am supposed to migrate a large amount of files from a current Shared Folder to a SharePoint team site. I am looking at the best way to do this and the Document Center as a subsite seems to me as a good solution. However, I need to apply a multilevel structure to this mass of files (about 4 levels approximately) and have first tried to create 4 main document libraries in the Document Center (by area of expertise). However, with this solution, the search feature will only search one library. Is there any way to "combine" and link these document libraries? Or another way to apply levels or create a structure in the Document center? I tried folders and document sets but not 100% satisfied.