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Why does my Samsung galaxy j7 keep losing memory , even though i remove apps n pictures

It hits a point that you can’t put anything else in. If you look at something on the internet it ads memory. I finally had to get something with more memory. I went from 16gb to 128gb. You should upgrade to the a10e or the a50 if you are looking for budget phones. I bought a Galaxy s10 plus for 300 dollars because the guy needed money. It even came with an otterbox case. It was in excellent condition. I hope that helps.

It seems you got the solution from fellow members, Anyway, the first thing that you will need to do in this case is to check what apps are using the most storage space. For Android Nougat - From any Home screen, tap the Apps icon. Tap Settings > Device maintenance.Tap Storage.View the Available space value. For Android Marshmallow - From any Home screen, tap the Apps icon.Tap Settings.Tap Storage.View the Available space value. You can clear the cache and data of the app or group of apps that are using up too much space. You can also opt to uninstall them if you are not really using them. You should also clear out some data on your phone by performing the following steps. Delete unnecessary text messages and picture messagesTransfer pictures and media to a computer to remove them from the phone memoryClear the browser cache, cookies, or historyClear Facebook app cacheDelete call logs In case the out of storage error message still appears then you should proceed with the additional troubleshooting steps listed below. Wipe the cache partition of the phone from the recovery mode.Backup your phone data then do a factory reset.