Yes, your drive choice affects After Effects performance and how much disk space you need

After Effects runs on whichever drive you install it on, but the drive type and speed directly change how fast your project works. A solid-state drive (SSD) makes a visible difference in playback speed and rendering time compared to a traditional hard drive (HDD). Beyond that, After Effects creates temporary files during work — sometimes gigabytes of them — so the drive you choose needs enough free space to handle both the program itself and those working files.

The real question is not whether it matters, but which drive setup makes sense for your workflow. Most people benefit from splitting the load across two drives: one for the program and one for the temporary cache files that After Effects generates constantly.

Key Takeaways

  • Installing After Effects on an SSD instead of a traditional hard drive noticeably speeds up playback, scrubbing, and rendering.
  • After Effects creates temporary cache files during work that can consume 50 GB or more on a single project, so your drive needs substantial free space beyond the program size.
  • The fastest setup uses two drives: an SSD for the program and another drive (SSD or HDD) dedicated to cache and temporary files.
  • You can tell After Effects where to store cache files in Preferences, so you do not have to install the program on your fastest drive if you do not want to.

SSD versus hard drive: what the difference means in real work

An SSD reads and writes data roughly 10 times faster than a traditional hard drive. In After Effects, this speed difference shows up immediately when you scrub through a timeline, preview effects, or render. On an HDD, you might wait 3 to 5 seconds for a preview to start playing. On an SSD, it starts almost instantly. For a project with many layers and effects, this difference compounds across hundreds of small operations during a work session.

Rendering — the final step where After Effects processes your entire composition into a video file — also runs faster on an SSD, though the improvement is smaller than during editing. The bigger gain is in the constant back-and-forth of daily work: opening projects, switching between compositions, applying effects, and watching previews.

If you have only one drive available, install After Effects on an SSD. If that is not possible and you have an HDD, the program will still work, but expect slower playback and longer waits during preview.

How much free space you actually need on your drive

After Effects itself takes roughly 4 to 5 GB of disk space. That is not the constraint. The constraint is the temporary cache files the program creates while you work.

When you play back a composition or apply an effect, After Effects renders that frame to a temporary file so it does not have to recalculate it every time you scrub past it. On a simple project with a few layers, this might be 10 to 20 GB. On a complex project with many effects, color grading, and high-resolution footage, the cache can grow to 100 GB or more. If your drive runs out of free space, After Effects slows down dramatically or stops working altogether.

A practical rule: keep at least 100 GB free on whichever drive stores your cache files. If you work with 4K footage or heavy effects, 200 GB is safer. You can check how much cache After Effects is using by going to Edit > Preferences > Media & Disk Cache and looking at the current cache size.

Setting up two drives for the fastest workflow

If you have access to two drives, the best setup is to install After Effects on one SSD and point the cache to a second drive. This keeps your program drive from filling up and lets each drive focus on what it does best: the program drive handles the application itself, and the cache drive handles the constant read-write operations of temporary files.

To change where After Effects stores cache files, open After Effects and go to Edit > Preferences > Media & Disk Cache. Click the folder icon next to "Disk Cache" and select a different drive. After Effects will use that location for all temporary files going forward. You can use an HDD for cache if your budget is tight — the speed difference matters less for cache than for the program itself, since cache operations happen in the background.

If you set up a second drive for cache, make sure it has at least 200 GB of free space. After Effects will not delete old cache automatically, so periodically empty the cache folder to reclaim space. You can do this safely from Preferences without losing any of your actual project files.

What happens if you install on an external drive

External drives — whether USB, Thunderbolt, or network-connected — work but introduce delays. A USB 3.0 external drive is slower than an internal SSD. A Thunderbolt external SSD is nearly as fast as an internal drive. A network drive is the slowest option and should be avoided for the program itself, though it can work for storing finished projects or source footage.

If you must use an external drive, use a Thunderbolt SSD if possible. USB external drives will work for the program, but you will notice the slowdown compared to an internal drive. Never install After Effects on a network drive or a USB 2.0 drive — the performance penalty is severe.

Checking your current drive setup and cache location

To see where After Effects is installed, right-click the After Effects icon on your desktop or in your Applications folder (Mac) or Program Files (Windows) and select Properties or Get Info. The location shown is your install drive.

To see where your cache is stored, open After Effects, go to Edit > Preferences > Media & Disk Cache, and look at the path next to "Disk Cache". If it shows your main drive, you can move it to a second drive using the folder button. After Effects will not move existing cache files automatically, so you can delete the old cache folder once you confirm the new location is working.

You can also see how much cache space you are using in that same Preferences window. If the number is growing toward your free disk space, clear the cache by clicking "Delete All" in the Media & Disk Cache section.

Drive speed and your project resolution

The higher your project resolution, the more your drive speed matters. A 1080p project with a few effects might run acceptably on an HDD. A 4K project with color grading, multiple effects, and adjustment layers will feel sluggish on anything slower than an SSD. If you work primarily in 4K or higher, an SSD is not optional — it is necessary for a usable workflow.

Similarly, if you work with high frame rates (60 fps or higher), the cache files grow faster and the drive speed becomes more critical. A 4K 60 fps project can generate cache files at a rate of several gigabytes per minute during playback, so a fast drive that can keep up is essential.

Frequently Asked Questions

Can I move After Effects to a different drive after installing it?

Yes, but the easiest method is to uninstall and reinstall on the new drive. If you want to move the existing installation, you can copy the entire After Effects folder to the new drive, but you may need to reinstall to ensure all system files are registered correctly. Uninstalling and reinstalling takes 15 to 20 minutes and guarantees everything works.

What if I only have one drive and it is almost full?

After Effects will still run, but performance will degrade as free space shrinks. Delete files you no longer need, or move old projects and footage to external storage. If you cannot free up space, consider adding an external SSD — even a USB-connected SSD is faster than a full internal drive.

Does the cache folder need to be on the same drive as my project files?

No. Your project files, source footage, and cache can all be on different drives. In fact, spreading them across multiple drives often improves performance because each drive handles less traffic. Your project file can be on a network drive, your footage on one SSD, and your cache on another.

Will clearing the cache delete my project or footage?

No. The cache folder contains only temporary preview files that After Effects recreates as needed. Clearing it frees disk space but does not affect your actual project file or any footage. After Effects will rebuild the cache the next time you play back a composition.

Is an M.2 SSD better than a SATA SSD for After Effects?

M.2 drives are faster on paper, but for After Effects work, the difference is small enough that you will not notice it. A SATA SSD is fast enough. If you are buying a new drive anyway, an M.2 drive costs about the same and future-proofs your setup, but do not replace a working SATA SSD just for After Effects.