How to Fix Low Disk Space Issue in Filmora?

The “Low Disk Space” error in Filmora is not always a direct indication that your hard drive is physically full. Instead, it is usually triggered by the way Filmora allocates and manages temporary resources such as render cache, preview files, and proxy media. These files are automatically generated during editing and stored on the system’s primary drive (commonly the C: drive).When the primary drive does not have sufficient free space to handle additional temporary files, Filmora cannot complete rendering or preview operations, leading to the “Low Disk Space” warning.

In short, this is a resource allocation issue rather than a hardware limitation. This distinction is important, as the fix usually involves clearing cache files, changing the temporary file location, or freeing space on the system drive, not just upgrading storage.

Below are the proven solutions that address this behavior.

1. Clear Filmora’s Render and Proxy Cache Files

1. Open Filmora.
2. Go to File > Preferences.
3. Navigate to the Media Cache section.
4. Clear both Preview Render Files and Proxy Files.
5. Restart Filmora to apply the changes.

2. Change the Temporary File Location

By default, Filmora saves temporary and proxy files on your system drive (C:). If that drive is full, Filmora cannot create new render or preview files. Moving these to a drive with more space resolves the issue.

1. Open Filmora > File > Preferences.
2. Go to the Folders tab.
3. Locate Proxy Files or Temporary Folder.
4. Click Browse and select a different drive with free space.
5. Click Apply, then restart Filmora.

3. Free Up Space Manually

If your disk truly is running low, Filmora won’t have room to generate temporary files. Manually freeing up space helps both the system and the editor run smoothly.

1. Empty the Recycle Bin.
2. Uninstall unused programs via Control Panel > Programs.
3. Run Windows + R, type temp, and delete all files inside.
4. Move large files from Downloads, Videos, or Documents to an external drive.
5. If your projects are on a nearly full drive, shift them to a secondary drive or external storage.

4. Reinstall Filmora on a Different Drive (Last Resort)

If none of the above work, reinstall Filmora on a larger drive. This resets where Filmora stores cache and prevents errors caused by insufficient system drive space.