To add to the above suggestions — your personal statement should be unique to you! You may never meet anyone in any admissions department face to face, so your personal statement will be how you can show them who you are, beyond your resume. If they admit you, what kind of person will be walking onto campus? What unique qualities will you bring to the campus community?
You will want to avoid regurgitating information that is included in your resume (ie. "I played volleyball."), but you may want to expand on an experience that was important to you (ie. "Playing volleyball for so many years has taught me the value X and has made me Y..."). Some schools will ask for longer personal statements that leave room for you to tell a story. Other prompts will require you to be very concise and direct. Make sure you read every prompt carefully, and look to see if the schools you are applying to have any additional guidelines or recommendations regarding the prompts on their websites.
TLDR: Read and follow the prompts, take the opportunity to add to your portfolio (instead of restating your resume), and write something that is true to who you are, that only you can write.
Best of luck!