My Samsung Galaxy S4 has become very crowded lately. It's a struggle to download and install updates to my apps, and as for new apps - forget it. I am constantly clearing all the caches I can find, including the system cache. All the apps that can be moved to the SD card are there already. My music is on the external SD card. All the ebooks I can send back to the cloud I've sent there. I've uninstalled 4 or 5 less-used apps. There's only one thing left for me to do: get my photos and downloaded images off my phone, and keep them where I can still get to them. So I installed Google Photos and backed up my pictures to it. But when I hit the Free Up Space button, Photos always tells me there's nothing to remove. I've even uninstalled and reinstalled Google Photos. Same problem. The Help pages in Photos tell me to sign in, but I can't find Sign In anywhere in Photos, even when Photos tells me I'm not signed in (and if I'm not signed un, how come I can see my photos?) I've synced all the Google apps I can sync, and I've tried to find a way to sign out of Gmail so I can sign back in, but there seems to be no way to sign out of Gmail (or Photos). Full disclosure: I still have Dropbox, just in case that might help. Would removing the photos manually from my phone help, or would it make matters worse? I'm at my wits' end.