I can’t update due to space

You can find some very good suggestions here, such as deleting apps you no longer use, deleting old email, deleting photos and more.

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

See if anything here helps. 

 Disk Space – Free Up    -

 Disk Space – Free Up (2).  -

 Disk Space – Free Up (3).  -

 Disk Space - Free Up (4)    -    

 Disk Space - Free Up (5)   -  

ASC YouTube for how to free up space on your iPhone, iPad, or iPod touch