Android 4.4.2 is nicknamed "KitKat" and is quite outdated.
Google Photos has a very powerful feature that allows you to backup your photos to the cloud:
https://support.google.com/photos/an...DAndroid&hl=en. I highly recommend taking advantage of this, because if you only keep your photos and videos saved to your phone, they're at risk of being lost forever if something happens to the phone. The Google Photos app can also be used as a standard Gallery app, although it can be a little confusing at first.
You may also want to try some other 3rd party gallery app, like
Focus. (Stay away from the old favorite QuickPic, since it was bought out by DU, a Chinese company that's known for sneaky adware.)
The bigger picture is that your phone is pretty obsolete, and running an outdated version of Android like KitKat puts you at increased risk for security breaches. I'd look into upgrading to a more recent phone some time soon.