Sold Macbook on ebay now new owner asking for HD-Data password
I recently sold my 2019 Macbook Pro on Ebay. I did a factory reset and shipped it off. Now the new owner is saying they can't transfer any files because the disk, "Macintosh HD-Data" is locked. I gave them the password I used for that computer and hopefully it will work out for them but I thought doing a factory reset would keep that from happening. Did I maybe miss a step?