Is there also so much information on your iPad? Then it is useful to make a regular copy of all that data. So at least you will not lose important data / stuff.
Backing up the data on an iPad can be done in two ways: via the computer and via the device itself.
You can put the pictures of the iPad on the computer using the default "Importing Images and Videos" feature. This is a good method to transfer all images stored on the iPad at one time to the computer. It is also useful that the computer recognizes which images are already on the computer. Have you taken new photos with the iPad since last time you imported photos, then the computer only imports these new photos.