If you get the “Insufficient Storage Available” error,smartphone for a while it can start to feel slow, and RAM — random access memory, which is where your phone stores its stuff as it’s using it — can be part of the problem. If your phone doesn’t have enough RAM it can struggle, but there are ways to address that. You can even create extra RAM without cracking the case or reaching for a soldering iron empty your app cache to see if that clears up enough working space for the installation. How to do so depends on what version of Android you are running, as well as from what device maker. (The screens here are for Android Lollipop .)Modern versions of Android have a Storage pane that will show you exactly what is taking up storage on your device. To find this, open the Settings screen and tap Storage. You can see how much space is used up by apps and their data, by pictures and videos, audio files, downloads, cached data, and miscellaneous other file
Open the Settings app, tap Apps, Applications, or Applications Manager option. (Applications Manager might be an option after either Apps or Applications.)
Scroll sideways to the Downloaded section. You’ll see a list of all apps and how much storage space they’re taking.
Tap the Menu or More button and choose Sort By Size to arrange the apps by which take the most storage.
Tap an app to see how much storage it is taking, both for the app and its data (the Storage section) and for its cache (the Cache section).
Tap Clear Cache to remove its cache and free up that space. You could also tap Clear data, but that removes your files, which is probably a bad idea.
Repeat for each app.
Older Android devices had an enforced separation between “system storage” and “USB storage” or “internal SD card.” In this case, a single physical internal storage device is partitioned into two chunks — one for the system and apps, and one for data. This means that you might not be able to make more space for media files by removing apps, or make more space for apps by removing media files. This just applies to older devices.
Modern Android devices have their entire internal storage available as a single chunk you can use for whatever you like. If you add an SD card, it will be available as second chunk of storage — the “external SD card” or “SD card” — but that’s it.