My smart phone Storage space running out daily.

My smartphone Storage space running out daily. I have already reset my phone twice a month. Please tell me what I do?

You need to free up storage space. Apps tend to download more stuff than you might realise - Whatsapp for example can save every photo and video to your phone, depending on settings, and other apps will also download a cache. You can clear app caches (this varies depending on your model/OS of phone, google is your friend), uninstall apps you don't need, delete files, or move them onto an SD card (android only). If you're on Android, there's an app called File Manager + that I find quite useful - if you install that, in the three-dot menu there's an 'analyze' function that tells you exactly how much space is being taken up by everything, or else you might consider a dedicated cleaner app like ccleaner.

Have you deleted old apps you don't use any more? Or deleted photos that you don't want any more (and have securely backed-up elsewhere)?

I've never used a Samsung, but I assume it has an app to manage your storage, and at least show you where the spaced is being used? Google suggests it should be in Settings | Battery and device care | Storage.

I have used phone manager apps, it's profitable but my phone gets slower and hangs.