How to free up Space on Android [2019]

How do I free up space on my Android Phone?

Clear Cached Data.

To free up Android space the first step is to clear cached data
If you dig into the Apps storage setting screen and tap on an individual app, you’ll notice that each app has its own stash of “cached” data—anywhere from a few kilobytes to hundreds of megs, or even more.
Every app looking for cached data to clear sounds like a chore, there’s an easy way to clear all cached app data in one fell swoop. Tap Settings > Storage > Cached data, then tap OK in the confirmation window.

Take Advantage of Google Drive

Google gives 15 gigs of free cloud storage with every account, so you might as well use it. Anything inside your Downloads or Files app can be jettisoned to your Google Drive by tapping the menu button in the top right corner and choosing “Send to...” This will open the share sheet, where you can select select 
Save to Drive to choose which folder to add it to. Then you can delete it from your phone without losing it forever. 

Clear Download Folder

Just like on a PC or a Mac, your Android device has a Downloads folder (or Files on Pixel and some Oreo phones). It’s a favorite hideout for miscellaneous junk files downloaded from the Web or by your various apps.
Open the app drawer and tap Downloads or Files to see what’s lurking inside. Tap the three-line menu icon in the top corner of the screen and sort the list of downloads by size, then take a look at what’s hogging the most storage space. If you see anything you don’t need, tap and hold the file to select it, then tap the Trash button.

Dumped Pics that are already Backup

One of the best features of Google’s Photos app is its ability to back up your entire photo library to your online Google account. Once your snapshots are safely backed up, Photos can zap any locally stored images to free up more space.
Open the Photos app, tap the three-line menu button in the top left corner of the screen, then tap Free up device storage. The Photos app will let you know how many pictures it can delete from local storage; tap OK to pull the trigger

Use SD card

Nearly every Android phone you can buy in 2019 has a slot for expandable storage, so you’ll be able to double, triple, and quadruple the space on your phone for just a few bucks. You’ll want to get a micro SD card from Samsung or SanDisk in at least 32GB capacity. Prices per gigabyte decrease substantially as the capacity increases, so you should buy the biggest card that you can afford. As a very general rule, around $0.40 per gigabyte is a good price.
Once you select the size you want, installing it is a snap. There’s no formatting to worry about, just pop open your SIM card slot and slide in the SD card. Then, you’ll be able to shift files and apps onto the card as needed to free up precious internal space.