Why do shared drives fill with MOV faster than MP4 folders of the same runtime?
Editorial teams park ProRes proxies, synced multicam angles, and screen captures inside MOV shells, so searches like mov huge final cut proxy, nas full, cold storage cost, archive compression, and lto migration spike together. The goal is cheaper bytes for footage nobody will re-grade, not to crush the only timeline-linked master still under legal hold. Classify folders into watch-only, might-reconform, and evidence before you queue presets; log filename, hash, tool build, and operator for every batch so six months later you can answer who touched what. Sync-drive deletes do not instantly erase versioned cloud objects—pair compression with lifecycle rules instead of assuming Finder free space turning green means the company is safe.
Storage cleanup checklist before batch-compressing MOV archives
- Tag DAM rows as review-only versus reconform-risk; only the first bucket enters aggressive compression queues without extra legal sign-off.
- Hash originals offline, compress into fresh keys, then spot-check ten random outputs for subtitle legibility and shadow detail before deleting anything.
- Watch the cloud bill for egress spikes—if traffic jumps after compression, teams are still streaming the derivative as if it were the master and you need training, not more bitrate.
Compress MOV · storage FAQ
Can I in-place overwrite every MOV older than one year on the NAS to halve size without object versioning?
That is how unique evidence dies—enable versioning or clone to offline disks first, then write new keys with hash ledgers instead of blind overwrite.
Should ProRes proxy MOV folders share the same preset as camera originals to save config time?
No—proxies still feed reconform paths; split queues and suffixes so editorial does not inherit a tourist preset meant for watch-only b-roll.
Compressed files barely shrink—does that mean the tool failed?
Probably not—highly efficient H.264 screen captures already hug the bitrate knee; trim duration, lower width, or tier cold storage instead of hammering the same settings.
If I delete the cloud copy after compressing locally, will sync clients instantly reclaim space everywhere?
Sync semantics are messy—use governed lifecycle policies so teammates are not mid-download when replicas vanish.
Does finance accept compressed MOV alone as proof we matched the aired master years later?
Usually not—auditors expect comparable high-fidelity generations plus hash chains; compressed copies are for everyday retrieval, not sole custody unless contracts say otherwise.