Note: My phone is NOT a smartphone. It is NOT an Android, or Galaxy, or iPhone. But I want to move pictures and videos and even a few text messages off of my phone onto a more permanent storage solution so I can free up some space on my phone without losing these items.
Also, if I upgrade my phone (to a smartphone), would these images/videos/messages be forever trapped on my old non-Smartphone or could they then be transferred to the new phone, which might actually link to a storage device easier?
That suggests you can email them to yourself.
Years ago, there was a package I saw in Best Buy that had software and connectors and promised to be able to download from any phone. I don't know if that exists still or if the T199 is compatible with that. I can't find anything on Google that allows for that.
The videos / images may be able to be emailed to yourself, but messages will forever be trapped in your non-smartphone.
Manage your T-Mobile account