The Unexpected Link Between Data Storage and Phone Weight

The data stored on your phone does have a weight due to the mass of electrons, as explained by Einstein's equation (E = mc2). When information is added or removed from flash memory, the energy levels change, resulting in a change in mass. However, the amount of data that can be stored on modern phones is not enough to make a noticeable difference in weight. Even with the maximum amount of data storage available on the latest iPhone, the weight difference is only around 0.1 femtograms, which is effectively unmeasurable. Therefore, your phone does technically weigh more when it's full of data, but not enough for you to notice.