How and what can I move from my phone's card to an SD card so I can get more space on my Phones card? The Phone card is nearly full and I have to clean out files regularly and don't have room for more apps. I have moved most data like videos and Pictures, but still not much room. I have a SkyPro J7 Samsung.
Well in most situations videos, audio files, and photos use up the most storage space, especially when you have a large accumulation of them. Since you mentioned moving some or all of your videos and photos from the internal storage to your microSD card and your phone's storage memory is still pretty much out of free space unless you have a really large music library built up and can move that over you don't have a lot of options as far as a long term solution. Might be easier to start looking into buying a new phone, a model with a substantially larger amount of internal storage (i.e. 64 to 128GB).
In the meantime, since you referred to needing more room for more apps, you should look through your Settings >> Apps menu and uninstall any apps you've installed that you know you no longer need or use. (... and don't just use the Uninstall button. Tap on the Clear data button first, then the Uninstall button. Clear data removes all of that apps config and settings files, along with clearing the app's cache.)
The Settings >> Storage menu initially shows just how much data is used and what's available but if you tap on the internal storage or microSD card storage options that will open a very rudimentary file/folder manager. That might indicate some files and things you either move to your card or delete. You didn't refer to what file manager you're using, are you using Samsung's My Files app or an installed third-party file manager app?
You might also want to install this 'DiskUsage' app:
https://play.google.com/store/apps/details?id=com.google.android.diskusage&hl=en_US&gl=US
Its a utility that shows your phone's storage media in a graphically detailed way, some people find its pictorial interface to be more user friendly than the more utilitarian interface that more file manager apps use.
To be clear, we are not affiliated with Mint, just users helping each other. I had the 3GB plan for my son for a few years and when he would occasionally run out I would simple buy an extra 1GB for $10 to get him through the end of the month. While not exactly what you are looking for, this would overall be less expensive than going to the 10GB plan. All that said, I've had to move all of the plans to unlimited. 
