A Microsoft file hosting and synchronization service.
Just want to throw my frustration into the mix. My wife spent two hours carefully editing a file and it cannot be saved anywhere. Whether you choose Save or Save As at any location (in OneDrive, outside of OneDrive, even over the home network) and upon hitting the save button the Save As dialog pops up all over again. Talk about being f**ked.
The best work around I've found is to use CTRL+S, then close the document. I've been every single document. If you want to back up spreadsheets, copy the document, then paste it to the separate location. I've had success doing this and have been able to copy documents to OneDrive using this method.
But, we shouldn't have to do this.
And trying to do this for several documents is... well, words fail. I've tried Excel online, but the functionality isn't there.
Note to Microsoft: HELP! PLEASE! SOON!