Maybe I'm missing something but I'm currently using Boxcryptor with OneDrive. The files are set to download "on demand" so they don't take up any space as is. Recently I opened Boxcryptor and started moving files from OneDrive to an external hard drive. BoxCryptor downloads the files from OneDrive and moves them, but at the same time I'm noticing that my hard drive space is decreasing. The files are no longer in OneDrive, and they are certainly on the external device, yet I'm losing space in C: every time I cut/paste a folder.
Any ideas? It's a Win 10 machine. I'm assuming something is being "cached" or downloaded somewhere but I can't find it.