You're definitely not the videos on an sdcard, and even the text-only (nopic) ZIM file is 43G, see the line "Wikipedia (English) en 2021-01 all nopic" on this

You're definitely not the videos on an sdcard, and even the text-only (nopic) ZIM file is 43G, see the line "Wikipedia (English) en 2021-01 all nopic" on this page https://wiki.kiwix.org/wiki/Content_in_all_languages https://wiki.kiwix.org/wiki/Content_in_all_languages So you'll need at least a 64G card. If you want 23+ languages + videos simultaneously you'll need to setup an external drive with larger capacity.