If you’ve ever stared at your phone’s storage warning right before a long commute wondering how much storage is Honkai Star Rail on mobile, you’re not alone. Most mobile players underestimate how much space the game takes up after all the voice packs, cutscenes, and post-launch updates roll out. I’ve had to delete old screenshots and unused apps more than once to make room for a new version drop, so I’ve put together all the exact numbers and space-saving tips you need to avoid that frustration.
Exact Numbers: How Much Storage Is Honkai Star Rail on Mobile
The total space you need depends on your operating system and which extra resources you choose to download, but we’ve pulled the latest official numbers from HoYoverse’s support page to give you a clear breakdown. Keep in mind these numbers are for the most recent version of the game, as of the latest patch release, and will grow slightly with each new update. You should always leave extra free space on your device to avoid install failures or corrupted files when you download a new patch.
- Base install size for Android: 5.8 GB (initial download from Google Play Store, only includes core gameplay assets)
- Base install size for iOS: 6.2 GB (initial download from App Store, optimized for iPhone and iPad hardware)
- Post-install resource download (all voice packs, full cutscenes, event assets): 12-15 GB additional space (this is the download you see right after you open the game for the first time)
- Recommended free space for future updates: 3-4 GB extra to avoid install failures, as most major patches are 2-3 GB in size before unpacking
That means the total recommended space for most players is between 21 and 25 GB for a full install with all resources. If you only download one voice pack and skip optional high-resolution assets, you can get that number down to around 16 GB total for a functional install that still runs perfectly. You don’t have to download all optional resources if you’re tight on space, and we’ll cover which ones you can safely skip later in this guide.
Why Honkai Star Rail Takes Up So Much Space on Your Phone
It’s not unusual for modern gacha games to take up 10+ GB of space, but HSR is on the larger end of the spectrum for a few key reasons. Unlike many casual mobile games that use low-poly assets and compressed audio, HoYoverse builds HSR to have the same visual quality as a PC or console game, which translates to larger file sizes even on mobile. The game’s dev team has said they prioritize visual and audio quality over small file sizes, so you can expect the total space required to keep growing as new regions and characters are added.
The biggest space hogs in the game are uncompressed 4K cutscenes for main story missions and character trailers. Each new version adds 2-3 new cutscenes that take up 500 MB to 1 GB each, and these are downloaded automatically unless you toggle off high-resolution assets in your settings. The regional voice pack downloads are another major contributor: each voice dub is 3-4 GB in size, so if you download all four available dubs, you’re adding 12 GB of extra space to your install right there.
Other smaller contributors include event assets, character model previews, and saved replay data for forgotten hall or simulated universe runs. These add up over time, even if you don’t realize it, so clearing them out every few months can free up a surprising amount of space. You don’t lose any progress by deleting old event assets, as you can redownload them if you ever want to replay old event stories later.
Easy Tips to Reduce Honkai Star Rail Mobile Storage Usage
You don’t have to delete your favorite photos or other important apps to make room for HSR. There are a few simple tweaks you can make to cut down the game’s total size by 30-40% without losing any core gameplay functionality. These tips work for both Android and iOS devices, and none of them will impact your save data or account progress, so you can try them without any risk.
First, audit your app library to remove any apps you haven’t opened in the last 30 days. A lot of casual game apps take up 1-2GB of space each that you can free up instantly if you don’t play them regularly. For example, if you only play casual card games once a week when you’re waiting for your bus, you don’t need to keep large installed versions on your phone — many players opt for lighter browser-based options like HiRummy that don’t take up permanent storage space on your device, leaving more room for games you play daily like HSR.
Next, you can remove unused voice packs from your HSR settings. The game lets you download up to four different voice dubs (Chinese, English, Japanese, Korean) but you only need to keep the one you actually use. Deleting the other three can free up 3-4 GB of space immediately, with no impact on your gameplay experience. You can always redownload the voice packs later if you want to switch dubs for a character story.
Another cache clearing trick works for both Android and iOS users: Go to your HSR app settings, select “clear temporary cache”, and you can delete 1-2 GB of old event files, unused asset previews, and login data that the game no longer needs. This won’t delete any of your save data or installed game resources, so it’s a low-risk way to free up extra space fast. You can also toggle off the “auto-download high-resolution assets” option in your in-game settings to stop the game from downloading large 4K cutscenes automatically, which will cut down the size of future patch downloads by 50% or more.
What to Do If You Don’t Have Enough Space for HSR Updates
If you get a storage error when you try to download a new HSR patch, don’t panic. There are a few quick fixes you can try before you delete the whole game and reinstall it, which can save you hours of waiting for downloads to finish. First, try restarting your phone to clear temporary system cache, which can free up 1-2 GB of hidden space that your device was holding onto for background processes. That’s often enough to get the patch installed without any extra work.
If that doesn’t work, try deleting any large downloaded files you no longer need, like old movies, offline playlists, or screenshot albums you’ve already backed up to the cloud. Most people have 5-10 GB of unused files sitting in their downloads folder that they forgot about, so that’s the first place to check. You can also offload unused apps on iOS or disable pre-installed bloatware on Android that you never use, which can free up even more space without deleting any of your personal files.
If you still don’t have enough space, you can try reinstalling the game completely. It sounds counterintuitive, but over time, HSR accumulates leftover files from old patches that don’t get deleted automatically, so a fresh install can be 2-3 GB smaller than an existing install that’s been updated through multiple patches. Just make sure you’re logged into your HoYoverse account or linked your social media account before you delete the game, so you don’t lose your save data when you reinstall.
At the end of the day, figuring out how much storage is Honkai Star Rail on mobile doesn’t have to be a guessing game. As long as you plan for extra space for updates and use the simple space-saving tricks we covered, you won’t have to pause your Trailblaze journey to delete files last minute. Next time you’re prepping for a trip or a new update drop, you’ll know exactly how much room you need to keep HSR running smoothly on your phone.
