how to reassign my ipad for someone else
How to assign my old iPad without erasing all the info on my present newer iPad that I have currently been using?
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Click on the link and read this article. It is too long for me to copy and paste the entire thing here which some people seem to require before they will read something.
What to do before selling or giving away your iPhone, iPad, or iPod touch [or if you received one that had not been erased] - "Use these steps to remove your personal information from a device, even if you don't have it anymore." - https://support.apple.com/HT201351
Doing the instructions as indicated will not result in things being deleted from other items you own.