When trying to sync files in Microsoft OneDrive for Business I receive the following error:Microsoft OneDrive for Business error Folder is held because of a  previous error ASSERT Tag: .aab
Microsoft OneDrive for Business error
onedrive
The following steps seem to have resolved the issue:Clear all IE browsing history.Stop syncing all SkyDrive Pro folders (move away current folders to avoid duplicate renamed folders) for the client in question.Close all your Office processes, such as groove.exe which is SkyDrive Pro,msouc.exe,  msosync.exe, office library sync via Task manager.Browse to C:\Users\username\AppData\Local\Microsoft\Office\Spw and delete all the content. You will find that this is all related to groove, and spw equals SharePoint Workspace.Go to C:\Users\username\AppData\Local\Microsoft\Office\15.0\OfficeFileCache and also delete all content of this folder. This is where all the cache of your files are stored.(its ok if one or two items cannot be deleted).After completing the above mentioned steps, please start SkyDrive Pro via using Program Files\Microsoft Office\Office15\GROOVE.EXE or type groove in the Search programs and files filed in Start, then launch the groove).Re-sync your library.Source: http://community.office365.com/en-us/f/148/p/189095/556486.aspx