On System Settings’ Region & Language page, you can now choose how you’d like storage sizes to be displayed. This means you can change them to the more common MB and GB style, instead of MiB and GiB, for example. Note that the default value has not changed, but you have the option to change it yourself (Méven Car, Plasma 6.1. Link):
This is a companion discussion topic for the original entry at https://pointieststick.com/2024/04/26/this-week-in-kde-megabytes-and-gigabytes-for-all/