Google photos, my man. It will sync any you CAN find and mark, just leave your phone on wireless and plugged in until done.
In the future, set that up with whichever cloud app you want with a new phone (it sounds like you’re getting one.) Skip having to worry about local storage on the device if at all possible.
As an example of what Google Photos can do, it will pull exif locations, analyze picture contents and help you archive things that are static and low use. So things like receipt pictures pops up an “archive these?” question, while you can also do content searches for terms like, “San Diego,” pets, or food and pull actual content related by dkim or even the content of the picture with the search in your Google Photos. It’s amazing and well worth using.
Because an actual picture is worth a thousand words, this is an example of what I’m talking about. I have not tagged photos in any way. This pulls data from when the picture was taken and if using location data on your phone, from where you were. It’s also doing some crazy content interpretation of the photos as part of the search. I install a lot of network gear. Here I’m searching for, “wiring.”
EDIT: exif, not dkim. I’m confusing work acronyms with picture metadata.