It’s odd: Questions about the physical weight of data get asked fairly often — I don’t know what’s prompting it. Perhaps the move to SSDs? The most recent iteration phrased it this way: “Does data have physical weight? If something is 10 gigabytes, does it actually weigh whatever system you have it installed on down?”
— Read on langa.com/index.php/2019/08/29/yes-your-hdds-and-ssds-really-do-weigh-more-when-in-use/