How to Clear Media Cache Files in Premiere Pro the Right Way

My boot drive hit 98 percent full on a Friday afternoon, the worst possible time. The culprit was not project files. It was 140 gigabytes of Premiere Pro media cache that I had never once looked at. If you have been editing for more than a few months, you almost certainly have a hidden pile just like it. Let me show you how to clear it properly, when you should leave it alone, and the part nobody talks about: the cache is not your real problem.

What the media cache actually is

When you import footage, Premiere Pro builds helper files so playback stays smooth. It writes peak files for audio waveforms, indexed and conformed versions of certain formats, and accelerator files that make scrubbing feel instant. These live in your Media Cache Files and Media Cache Database folders. They are disposable. Premiere rebuilds anything it needs the next time you open a project.

That last sentence is the whole point. The cache is regenerable. Your source footage, your project file, your exports: those are precious. The cache is not. So clearing it is low risk as long as you understand the tradeoff. Delete it and the next project open will be slower while Premiere reconforms. That is the only cost.

Here is my contrarian take. Most tutorials treat cache deletion like a deep cleaning ritual. It is not. It is taking out the trash. The real skill is preventing the mess in the first place, which I will get to.

How to clear the cache safely, step by step

Close every project before you touch anything. Deleting cache while a sequence is open invites weird playback errors. Then walk through this.

When the dialog appears, you usually get two choices. Delete unused cache files removes only the helpers tied to media you no longer reference. Delete all removes everything, including cache for projects you are still working on. Pick unused unless your drive is genuinely critical, because all means every active project rebuilds from scratch.

If Premiere will not launch at all because the drive is full, you can delete the cache folders manually from Finder or File Explorer. Find the Media Cache Files and Media Cache Database folders at the location set in Preferences, then drag them to trash and empty it. Premiere recreates both folders on next launch. Just never delete the project file sitting next to them by accident.

• Confirm all projects are closed
• Delete unused cache before delete all
• Empty the trash to actually reclaim space
• Verify free space climbed afterward
• Reopen one project and confirm clean playback

Stop the cache from ballooning again

Clearing once and forgetting is how you end up back at 98 percent in three months. Set guardrails instead.

In Preferences under Media Cache, there is an automatic deletion setting. Tell Premiere to remove cache files older than a set number of days, or once the folder passes a size limit you choose. I cap mine and forget about it. Set it once and the trash empties itself.

Next, move the cache off your boot drive. Point the cache location at a fast secondary SSD. Your operating system drive stops filling up, and a dedicated scratch disk often improves playback too. This single change has saved me more emergency cleanups than anything else.

The bigger problem the cache is hiding

Here is what that overflowing cache was really telling me. My whole post workflow lived on local drives and in scattered folders. Footage here, review exports there, three versions of the same cut with no clear winner, client notes buried in email. The cache was just the symptom that finally tripped an alarm.

Picture the usual review loop. You finish a cut, export an MP4, upload it to a file transfer tool or attach it to an email, and wait. The client replies with vague notes like make the intro punchier and the logo feels off. You guess which intro, which logo moment, open Premiere, rebuild cache because the drive was wiped, and re-export. Multiply that by three rounds and two stakeholders and you have a week of churn that has nothing to do with editing skill.

I moved the review and approval half of my work into PlayPause and the picture changed. Reviewers click the exact frame and leave a comment pinned to that timecode. They can draw right on the frame and @mention a teammate. No more guessing what the off logo meant. Every cut becomes a version in a stack, so I can run side-by-side compare between v2 and v3 instead of keeping four exports on a dying drive. When a cut is approved, an approval lock makes it official and obvious.

Sharing got safer too. Secure share links carry passwords, expiry dates, domain restriction, and watermarking, so a rough cut does not leak. Guests upload reference clips with no account to create. There are Premiere Pro and After Effects panels, so I review without leaving the timeline, plus Slack, Microsoft Teams, and Zapier connections and viewer analytics that show who actually watched. Camera-to-Cloud proxies even arrive from set, which means review starts before I have ingested a single card.

Now weigh the alternatives honestly. Email, WeTransfer, Google Drive, and Dropbox are file transfer, not review. They move a file and stop there. No timecoded notes, no version stacks, no approval state. Frame.io is a real review tool, but it charges per seat, so every client, freelancer, and stakeholder you add raises the bill, and your bill grows exactly when your project does. PlayPause prices flat per workspace, not per seat: Free at 0 dollars, Creator at 9 dollars a month, Agency at 15 dollars a month, Enterprise at 27 dollars a month. Invite the whole client team and the price does not move.

The bottom line

Clear your Premiere Pro media cache when your drive gets tight, delete unused before delete all, set auto-deletion, and move the cache to a secondary SSD so you stop firefighting. That handles the symptom. The deeper fix is getting your review, versioning, and approvals out of email and scattered folders and into one place built for it.

Try PlayPause free. Spin up a workspace, drop in your latest cut, and send a secure link for frame-accurate feedback in minutes. Your drive, and your afternoons, will thank you.