7 tips to get rid of junk files and recover storage space on iPhone

By , Nov 17, 2015

iPhone low storage warning image 001

There’s nothing worse than pulling an iPhone out of your pocket to capture that brief moment in life that will never repeat itself only to be met with a “storage almost full” message.

It’s a sinking feeling so no wonder that most folks tend to immediately remove older photos.

But there are better ways to free up storage space on your device that don’t necessarily involve deleting your precious memories. Faced with a low-storage prompt, your first order of business should be checking if apps you frequently use are gobbling up your storage by caching large amounts of data.

That’s just the starters, as there’re plenty of other space-saving techniques you should be employing on a regular basis. In this tutorial, you’ll learn how to manually flush app caches, disable certain iOS features and flip the switches you never knew existed in order to remove as much of the cruft clogging up your iOS device as possible.

About the cruft…

App caches along with temporary files, logs and other low-priority data all quickly add up to the Other storage section, as shown in iTunes.

For many people the Other storage quickly balloons to anywhere between a few hundred megabytes to a few gigabytes’ worth of storage that could be put to better use like downloading more apps, storing additional media on the device and more.

As evidenced by the screenshot below, the Other storage on my iPhone 6s is taking up nearly two gigabytes of storage and I’m barely a month into this new phone.

iTunes Other iPhone storage Mac screenshot 002

It’s important to keep in mind that clearing the cruft clogging up your iOS device is a temporary solution as they’re created over time by virtue of your app usage.

Method #1: do a force restart

Force-restarting an iOS device (also known as a cold reset) helps wipe out some of the temporary files and caches. To perform a force restart of your iOS device, press and hold the Sleep/Wake and Home buttons simultaneously until an Apple logo appears. I myself do this at least once per week just to be on the safe side. Force restarts also have the benefit of helping iOS run a little snappier.

Method #2: delete caches through Settings

Some apps give you controls to flush their caches through Settings. Because iOS doesn’t distinguish between apps that have these controls from those that don’t, you need to check this on a per-app basis.

Step 1: Launch Settings on your iOS device.

Step 2: On iOS 9, head over to the General → Storage & iCloud Usage section. On iOS 8, go to the General → Usage section. Now tap Manage Storage under the heading Storage. You will see a list of apps installed on your device, sorted by how much local device storage each is taking up.

Step 3: Now drill into a specific app’s information to see how much storage its on-device data is taking up. I think I might want to remove cached webpages saved on my iPhone as part of Safari’s Reading List feature.

iOS 9 Manage Storage iPhone screenshot 001

Step 4: Now slide unwanted items to the left and tap Delete, or tap Edit → Delete All to remove all the app’s data.

As the screenshot above attests, I was able to regain nearly half a gigabyte of storage space lost to Safari’s Reading List cache. Don’t worry, this will only remove cached items from your device, not the actual webpages in your Reading List.

RELATED: How to clear Safari’s Offline Reading List cache

Some apps permit you to cherry-pick locally-stored documents that you wish to remove, including Apple’s stock Music, Videos and iBooks apps. In the case of the Music app, you can remove individual songs or whole albums that you have marked for offline listening on the same Settings screen.

iOS 9 Manage Storage iPhone screenshot 002

RELATED: How to remove unwanted electronic books in iOS

Managing storage through Settings doesn’t just conveniently inform you how much data apps use but also provides an at-a-glance overview of  all the apps on the device.

Method #3: delete caches from within apps

As mentioned, many apps lack cache-related controls in Settings and instead provide in-app controls. A good example is Tweetbot.

A quick trip to Settings and I realize that I’ve lost over a hundred megabytes of storage to Tweetbot’s cache alone. It’s not alarming but on the other hand every megabyte counts, especially when faced with iOS’s low storage warning.

iOS 9 Manage Storage iPhone screenshot 003

In the case of Tweetbot, I selected my personal account in the app’s settings interface and hit the red Resent Account Cache button at the bottom. Those who use multiple Twitter accounts with Tweetbot will need to repeat the process for each account.

Tweetbot clear caches iPhone screenshot 001

Method #4: reinstall space-hogging apps

This is a 100 percent safe way to reclaim Other storage and ensure that no app-specific junk is left behind. Before you proceed, you’ll want to make sure that content you have created and stored within apps is backed up somewhere.

I typically use iOS’s multi-purpose Share menu to email content to myself or beam it wirelessly to my Mac with AirDrop, but your can upload your stuff to online storage services like Dropbox or OneDrive.

Step 1: Tap and hold an app icon’s on the Home screen so that icons start jiggling. Now hit the X symbol in the upper-left icon corner to remove the app in question.

Step 2: Open the App Store and visit the Purchased section, where you can redownload any previously installed app, free or paid.

To delete apps even faster, use the storage management interface of the Settings app to zoom in on major space-hogs. Then tap an app in the list and hit the red Delete App button at the bottom of the next screen.

iOS 9 Manage Storage iPhone screenshot 004

In my own example, I was able to regain more than one gigabyte of storage just by deleting and reinstalling Tweetbot, Twitter, Facebook, Paper by Facebook, Facebook Messenger, WhatsApp, Viber, Skype and the Google app.

That’s excluding nearly half a gigabyte’s worth of Safari’s Reading List cache up, mind you. If I clear out Safari’s cache and proceed with additional space-saving techniques outlined further below, I might be able to regain almost all Other storage.

Method #5: start over

Yes, you read that right. If you cannot reclaim a meaningful amount of your precious ‘Other’ storage for whatever reason, starting anew by restoring your device gives you a completely clean slate and makes the device run faster.

Step 1: First, perform a full backup of an iOS device in iTunes (with encryption enabled) or through iCloud so you can revert to it later, if you want.

Step 2: Perform a full restore, which deletes everything on the device, by going to Settings → General → Reset → Erase All Content and Settings.

Step 3: Set up your device as new, reinstall the apps you need, adjust iOS and app settings and sync your media through iTunes or other methods (Dropbox).

Don’t restore your device from a backup. Although caches and temporary files apps mark for deletion are not backed up, starting from scratch is the best way to get rid of leftover files carried over from previous installations.

Method #6: use space-cleaning apps

In addition to manual storage management, you might want to try out dedicated iOS file managers and apps focused on removing junk files.

There are plenty of them out there (Google is your friend) so I’m going to single out PhoneExpander (pictured below), PhoneClean, iFunBox, iMazing and the upcoming Decipher Phone Cleaner by Decipher Tools, to name just a few.

PhoneExpander for Mac Main menu

DISCLAIMER: Uninformed use of these tools is highly discouraged. Apple prohibits users from accessing the iOS file system for a very good reason. Not really knowing what you’re doing can easily mess up your device.

If you’re jailbroken, there are even better ways of managing your storage such as Ryan Petrich’s useful cache-cleaning tool.

Method #7: be smart about iOS features

A range of other space-saving techniques are at your disposal, some of which can free up large chunks of storage occupied by iOS features.

For starters, disable Photo Stream ( Settings → Photos & Camera → My Photo Stream → Delete), turn off Keep Normal Photo in your Photos & Camera settings and clear out Safari’s cache (Settings → Safari → Clear History and Website Data).

Next, manually delete unwanted voice memos and voice mails, old podcast episodes, videos you’ve watched, books you’ve read, music you no longer enjoy, screenshots, photo duplicates and visually similar items in your Camera roll.

iOS 7 (how to delete Videos, teaser 001)

If I were you, I’d also consider doing the following:

  • Remove custom dictionaries
  • Turn off high-quality voices for VoiceOver
  • Disable system languages you don’t use
  • Restrict Background App Refresh to as few apps as possible
  • Remove (and re-add) email accounts to free up storage lost to attachments
  • In Messages settings, elect to never store photo and video attachments

Clearing out the Recently Deleted albums in Photos, converting some Live Photos into stills and limiting video capture to 1080p instead of 4K are sound advices, too.

Disable 4K iPhone

To clear out Siri’s cache, disable and re-enable the feature in Settings. It might as well be a good idea to disable unwanted apps in Spotlight in order to keep the size of iOS’s search index under control. Oh, and do sync your device with iTunes (I know, don’t start) on a regular basis: doing so will transfer CrashReporter logs to your computer and delete them from the device.

iOS 9 Manage Storage iPhone screenshot 005

As a last resort, switch off items you really don’t need in Settings → iCloud.

Moreover, disable iOS features such as third-party keyboards, delete your custom keyboard shortcuts, remove email apps you no longer use and trash the photos in apps like Camera+ and VSCO that by default store images in their own Documents folder.

iOS 9 and smarter storage management

iOS 9 itself incorporates interesting new techniques designed to optimize storage use. For instance, apps compatible with iOS 9’s new App Thinning technique only download assets and code tailored to your specific device.

And some apps and games, including those designed for the new Apple TV, retrieve assets and resources on-demand to further trim down storage consumption.

iOS 9 App Deletion iPhone screenshot 001

And should you run out of storage, iOS 9 might offer to temporarily delete some apps and data, and automatically restore them after an iOS update is successfully deployed.

Recommended tutorials

To help you manage your iOS device storage like a pro, we’ve compiled the following list of tutorials that should come in handy:

It’s a wrap up!

You will hopefully appreciate and find these tips useful.

At any rate, managing closely apps that take up a lot of local storage is necessary to ensure that your device doesn’t run out of free space in the most inopportune moment.

If you want to share your own storage management techniques with fellow readers, post them in the comment section below.

Your feedback and suggestions are accepted via tips@iDownloadBlog.com.

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  • Pete

    You should probably remove your phone number & serial number

    • Elias Chao

      That would free some memory for sure.

  • J™

    I use iCleaner

  • DTT255

    Don’t you dare get rid of GnR!!!!

  • Does anyone know of a jailbreak tweak to delete Whatsapp’s cache of videos and stuff directly?

  • 5723alex .

    I use the free Battery Doctor to reclaim Memory and clear temp, cache.. data.

  • Fede777

    PhoneClean used to work, now it just says that since iOS version bla bla it can’t remove a lot of stuff.

  • If you’re jailbroken iCleaner is all you need.

  • Mr_Coldharbour

    Apple should’ve at least implemented Ryan Petrich’s method of cleaning caches in apps like in his ‘CacheClearer’ tweak. At least TapBots allows users to clear caches within apps. Instagram is one app that can be quite the storage hog, and should offer a similar solution.

  • Joonyaboy

    The one I didn’t see mentioned was Messages. My wife had 10GB of space taken up by the videos and pics sent through text (even though the original file was already taken off the phone

  • Dayvid Falcones

    I’m confused about the force restart – how would force turning off and then back on again clear any space? how does it know to do that being forcefully turned off instead of just manually restarting it with the slide to power off screen? also wouldn’t one be nervous about damaging the filesystem doing it forcefully what if it was in the middle of reading or writing data in the background or something and then you force restarted it right in the middle of it? I don’t really know much about this type of stuff but those were my concerns

    • DJGhostmare

      You’re not wrong. Force resetting the device should only be implemented when the unit completely and utterly stops responding—no response from buttons, no Siri activation, nothing. It’s akin to unplugging your iMac from the wall instead of pressing shutdown within the system. Applications and the operating system do not have enough time to shutdown their process Les effectively, thus causing errors it will attempt to rectify during the next launch (if it can).

      Due to how iOS is constructed it is unlikely that force resetting will cause damage to the operating system. Although it is still possible, it is very unlikely. Continued use of this action augments the probability rate. With every new version of iOS, this becomes less and less likely.

      What it can and will do is damage third-party applications, and does so very easily. Fortunately when this occurs, a simple reinstall of the affected applications should solve the issue.

  • William Wales

    Thanks! It’s really useful for us to know how to free up space for iPhone. I also use third party apps to clean up my iPhone 6. It’s more effecient than other conventional methods. There is a good software named iMyfone Umate iPhone Space Saver to free up storage space on your device that don’t necessarily involve deleting precious memories. iMyfone Umate iPhone Space Saver can deeply scan your iPhone and find the junk files which need to be deleted. Also it supports lossless photo compression to save your space. You don’t even have to worry about your photos will be ruined because the compression is lossless and your original photos will be backed up automatically to your computer.
    We don’t need to delete our beloved apps or photos, while iPhone storage will be cleared up. Why not give it a shot.

  • hello….Thanks! It’s really useful for us to know freeing up space on iphone.Without any space Iphone is of no use as you simply can’t download more stuff and update your operating system. People have always been curious to know about new ways to free up space on iPhone.now u get more info online at my website.

  • Samantha Kimball

    I’ve used the remove and re-add email on iOS 9.3.2 with my iphone 4s and the 1.7 gb of “mail and attachments” is still sitting there in Mail. After two forced reboots. Is this tactic no longer working with this ios?