It’s common to find KakaoTalk taking up several gigabytes when checking smartphone storage. It’s strange, though—most of what we exchange is text, so why is it so large?
The answer lies in the cache. When you open a photo or video in a chat room, that file is temporarily stored on your device to display it quickly the next time you open it. The problem is that these temporary files don’t delete themselves. The more group chats you have and the longer you use the app, the more they snowball.
The important thing is that this cache is not the original file. Even if you clear it, your chat history remains intact, and the photos stay in the chat room. If you open them again, they are downloaded from the server. In other words, the only thing you lose by clearing it is “the short wait time when viewing them again.”
1. Clearing the Entire Cache in App Settings
This is the first thing you should do, and it usually results in the biggest reduction.
Go to Settings → App Management → Storage Management. Here, you can see how much cache data and media data you have.
- Clear Cache Data: Deletes only temporary files. Chat and photo originals are preserved. You can tap this without worry.
- Clear Music/Video/Photo Data: Deletes downloaded media. You can re-download items still in the chat room, but old files that have already expired cannot be recovered. You should check before tapping this.
KakaoTalk has a retention period for files uploaded to the server. Photos from group chats years ago may have already been removed from the server, in which case the copy on your device is the only one left. The correct order is to save important photos to your gallery first before clearing.
2. Cleaning Up by Chat Room, Starting with the Heaviest
If the storage usage is still high after clearing the entire cache, a specific chat room is likely the culprit. This is usually the case for group chats or Open Chats where photos and videos are exchanged daily.
You can check the usage per chat room on the same Storage Management screen. Sorting them by size and cleaning them up provides the best results for the effort. You don’t need to touch everything; cleaning up just the top two or three usually solves the problem.
3. Settings to Prevent Re-accumulation
If you just clear it once, you’ll be back in the same situation in a few months. Set up these two prevention measures.
Turn off Auto-Download — Set it so that photos and videos uploaded to chat rooms are not downloaded automatically. Specifically, Auto-download on mobile data consumes both storage and data charges. Switching to a method where you only tap to view what you need significantly slows down the accumulation.
Check High-Quality Upload Options — If the setting to send photos in original quality is on, large files will remain on your device as well. For everyday conversations, standard quality is sufficient.
Talk Drawer (톡서랍) is a paid service that stores chats and media in the cloud. It’s an option if you want to free up device space while keeping records, but since access to stored data is restricted if you cancel the subscription, it’s best to decide if you plan to use it long-term.
Summary: Once a Month is Enough
Here is the summary of the steps:
- Save important photos to your gallery first
- Clear cache in Settings → App Management → Storage Management
- Individually clean up two or three large chat rooms
- Turn off auto-download
Doing this just once a month will significantly reduce the frequency of low storage notifications. The amount of space freed varies by person. If you have many group chats and have been using the app for years, you might get several gigabytes; for light users, it might only be a few hundred megabytes. Check your current usage before cleaning and compare it afterward to understand your own baseline.
⚠️ Menu names and paths may vary slightly depending on the app version and operating system. This article is based on August 2026; please check the descriptions of the deletion items before proceeding.
Frequently Asked Questions
Does clearing the cache delete chat history?
No, it does not. The cache consists of temporary files stored to speed up the display, so your chat history remains even if you clear it. However, “Clear Media Data” is different as it deletes the downloaded photos and videos themselves. Be careful with this item, as old files past their server retention period cannot be re-downloaded.
How much space can I free up?
It is proportional to your usage period and the number of group chats. If you’ve been using it for years with several active group chats where many photos are exchanged, it can be several gigabytes. For light accounts, it’s around a few hundred megabytes. Check your current usage on the Storage Management screen first.
Isn’t turning off auto-download inconvenient?
It’s just the difference of having to tap one more time to see a photo. In return, you stop downloading photos you don’t need to see, reducing both storage and data usage. A compromise is to set it to auto-download only on Wi-Fi.
What happens if I delete and reinstall the app?
The cache will be completely reset, but your chat history may also disappear. Unless you’ve used the backup feature (used when switching devices) beforehand, recovery is difficult. Reinstalling for the purpose of clearing storage is not recommended. Clearing the cache within the settings is sufficient.
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