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It won't keep it permanently. That would break under normal use. Keeping recent files will work fine with a program that goes through them as fast as it can u

• dpark 7mo ago
  It does keep them permanently. Dropbox is not a NAS and does not pretend to be one. > When you open an online-only file from the Dropbox folder on your computer, it will automatically download and become available offline. This means you’ll need to have enough hard drive space for the file to download before you can open it. You can change it back to online-only by following the instructions below. https://help.dropbox.com/sync/make-files-online-only https://help.dropbox.com/sync/make-files-online-only Same exact behavior for OneDrive, though it apparently does have a Windows integration to eventually migrate unused files back to online-only if enabled. > When you open an online-only file, it downloads to your device and becomes a locally available file. You can open a locally available file anytime, even without Internet access. If you need more space, you can change the file back to online only. Just right-click the file and select "Free up space." https://support.microsoft.com/en-us/office/save-disk-space-with-onedrive-files-on-demand-for-windows-0e6860d3-d9f3-4971-b321-7092438fb38e https://support.microsoft.com/en-us/office/save-disk-space-w...