# C:\\Users\\\\AppData\\Local\\UnrealEngine\\Common\\DerivedDataCache is getting so big, Safe to delete?

**URL:** <https://forums.unrealengine.com/t/c-users-appdata-local-unrealengine-common-deriveddatacache-is-getting-so-big-safe-to-delete/1488007>\
**Category:** Programming & Scripting\
**Tags:** unreal-engine, question\
**Created:** [December 5, 2023, 10:10pm UTC](https://forums.unrealengine.com/t/c-users-appdata-local-unrealengine-common-deriveddatacache-is-getting-so-big-safe-to-delete/1488007 "2023-12-05T22:10:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Guesscui2018](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Guesscui2018](https://forums.unrealengine.com/u/Guesscui2018)\
**Post date:** [December 5, 2023, 10:10pm UTC](https://forums.unrealengine.com/t/c-users-appdata-local-unrealengine-common-deriveddatacache-is-getting-so-big-safe-to-delete/1488007/1 "2023-12-05T22:10:30Z")

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Hello

I’m using UE5.1. recently found out that my C drive is running out of space due to the unreal DDC folder getting bigger.  
I wonder is it safe to delete all these files inside the folder? or is it possible to move them to some place else?  
Thanks!

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**Author:** ![SupportiveEntity](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@SupportiveEntity](https://forums.unrealengine.com/u/SupportiveEntity)\
**Post date:** [December 6, 2023, 7:00am UTC](https://forums.unrealengine.com/t/c-users-appdata-local-unrealengine-common-deriveddatacache-is-getting-so-big-safe-to-delete/1488007/2 "2023-12-06T07:00:49Z")

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Hey there @Guesscui2018! So the engine side DDC folder handles shaders and other cached data. This can be deleted but you’ll rebuild most of it when you launch the engine again. I’d recommend instead to move the cache to another location, then move the files there, as shader rebuilds take a while as is, first launch engine takes forever.

> [@How to move "Derived Data Cache" folder?](https://forums.unrealengine.com/t/how-to-move-derived-data-cache-folder/295868):
>
> Hey guys, I installed UE4 on my second HArd Disk (Sata III HDD rather than my SSD). Even if I did that, some files are still installed on my SSD (C:\Users\xxxxxxx\AppData\Local). I’m fine with it, but there is a folder called “Derived Data Cache” who takes more than 10Go of my SSD How can I move this “Derived Data Cache” folder ? Thanks ! EDIT: I saw on Hourences, that we can move this folder by editing the EngineDefault.ini ([Hourences.com – Tutorials – UE4 Quick first tips](http://www.hourences.com/tutorials-ue4-quick-first-tips/))

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**Author:** ![Guesscui2018](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Guesscui2018](https://forums.unrealengine.com/u/Guesscui2018)\
**Post date:** [December 6, 2023, 1:02pm UTC](https://forums.unrealengine.com/t/c-users-appdata-local-unrealengine-common-deriveddatacache-is-getting-so-big-safe-to-delete/1488007/3 "2023-12-06T13:02:53Z")

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Thanks a lot! Yes I think I’ve figured out a way of moving the DDC folder to another location, yes rebuilding takes a while but I think I’ll be fine after it’s done.

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**Author:** ![system](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/1/3/713c9d3f58553f0de89543d76a8a3a2779dc9fa4.png) [@system](https://forums.unrealengine.com/u/system)\
**Post date:** [January 5, 2024, 1:03pm UTC](https://forums.unrealengine.com/t/c-users-appdata-local-unrealengine-common-deriveddatacache-is-getting-so-big-safe-to-delete/1488007/4 "2024-01-05T13:03:35Z")

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