Well, at least you got to access it.

We use OneDrive at work, so I have all the right apps and accounts and whatnots. When I wanted to download a folder with a lot of files in it, it would regularly crap out.

There's no way to download the files as files unless you do it one by one. If you select multiple files, it produces a zip, which sometimes fails to transfer properly.

The Windows app is somewhat better, in that at least you can move the files as files. But even so, it's unreliable. The tray icon says everything is synced, but in the explorer some files still have the "syncing" icon. And of course, when I look on the browser, said files are missing. But there's no network activity, so it just... does nothing.

I have also not found an easy way to confirm all files are synced from the web. I haven't found an equivalent to the right-click -> properties to get the number of files and the actual size. So if you have a structure with several folders, you're SoL.