A Microsoft file hosting and synchronization service.
This does not do the trick for me. I cannot find any ClientPolicy.ini file in that folder (C:\Users<username>\AppData\Local\Microsoft\OneDrive\settings\Personal). None of the init files that I do see in the folder contains the key MaxClientMBTransferredPerDay.
The size of all files that I did manage to download is 535600, though, as I can see from my Windows Explorer. Shockingly close to 537600. So I am sure your answer is the right one, but I cannot find this key in the latest version of OneDrive/Win10.
Does anyone know whether this has been moved, e.g., to registry or elsewhere?
EDIT: I managed to make the file become re-created. I deactivated OneDrive ("unlink this PC"), then re-linked the PC again to the same account. All files in above folder were changed as I can see from the detailed file info. Among others, ClientPolicy.ini got re-created.