Here's what I did in Windows 8 using the desktop Sky Drive app and works well. Created a Document, Music, Picture folders in Sky drive. During the install of the desktop Sky drive app I set Sky drive to use/sync to my external 3 terabyte drive. In the desktop explorer I went to Skydrive (which now points to the external drive), right clicked on the Document folder and added it to the Documents Library. Then in the explorer pane in the desktop explorer I right clicked on the Documents Library, Selected "Properties" from the context menu. Under the Library Locations I clicked on the Document location on the external drive and clicked on Set Save Location. Repeat for other Libraries. Now when I save or accesses a document it saves or opens a document from my Sky drive (really the local synced location which is faster). I realize I have the document really in two locations - local folder and Sky drive - but when accessing the library it seems as one location and applications - Media Player - work well, sharing my music between PC's and the performance is great as it's really playing from the local sync'd location. Haven't used Google drive folder but should be able to do some thing along the same lines.