Problem
A cloud drive marks files as online-only placeholders, and the NLE attempts to read them as local media during playback.
Solution
Root Cause / Diagnostic:
Cloud storage sync engines (Dropbox Smart Sync, OneDrive Files On-Demand, iCloud Drive) create filesystem stubs (zero-byte pointer files). NLEs interpret these files as corrupted media or throw I/O errors because the actual media bits are not resident on disk.
Actionable Fix:
1. Pin Project Directories Locally: Right-click the root project and media folders in the OS file explorer and select "Make Available Offline" or "Always Keep on This Device".
2. Disable Automatic Cloud Storage Optimization: Turn off OS storage management tools (such as macOS "Optimize Mac Storage" or Windows "Storage Sense") that automatically offload local files.
3. Verify Byte Allocation via Terminal/Properties: Confirm that the folder's "Size on Disk" matches its logical "Size" before opening project files.
Pro Tip:
Set up a dedicated secondary SSD formatted as APFS or NTFS exclusively for active video projects and exclude this drive from automatic OS offloading utilities.
Cloud storage sync engines (Dropbox Smart Sync, OneDrive Files On-Demand, iCloud Drive) create filesystem stubs (zero-byte pointer files). NLEs interpret these files as corrupted media or throw I/O errors because the actual media bits are not resident on disk.
Actionable Fix:
1. Pin Project Directories Locally: Right-click the root project and media folders in the OS file explorer and select "Make Available Offline" or "Always Keep on This Device".
2. Disable Automatic Cloud Storage Optimization: Turn off OS storage management tools (such as macOS "Optimize Mac Storage" or Windows "Storage Sense") that automatically offload local files.
3. Verify Byte Allocation via Terminal/Properties: Confirm that the folder's "Size on Disk" matches its logical "Size" before opening project files.
Pro Tip:
Set up a dedicated secondary SSD formatted as APFS or NTFS exclusively for active video projects and exclude this drive from automatic OS offloading utilities.