How do I get more storage space

This has info about storage on your device

How to check the storage on your iPhone, iPad, and iPod touch - Apple Support

carolmann:

Have you followed the recommended procedures to "optimize" the use of the space on your iPhone 8?

Once that is done. If you are still too "cramped" for space:

• If you still have "plenty" of space on iCloud, move files to iCloud, and change the settings for some of your Apps to use iCloud. (I did that early on, so I have rather little actually on my device.)
• If you are running too "tight" on iCloud, as well, you may want to purchase more iCloud space.

If you have a desktop or laptop computer, you may free up space by saving files (like a backup) to its hard-drive.

Sometimes, no matter what, you may simply be too "cramped" with your device. (I've had that problem with all the cheep Android phones I have purchased!)

If so, only you can decide whether to "pop" for a new device.

my iPhone 8 does not have anymore space

what can i do?

I need to purchase more storage.

More iCloud storage will not increase your storage on your device. If your iPad has 2 gig of free space, purchasing 50 gig of icloud will not allow you to store more stuff on your ipad.

pay for more storage

Did you even try to read the posts in this thread? You can not buy more storage space for your phone.