How has offline Wikipedia affected you? The Wikimedia Foundation (the non-profit that supports Wikipedia) is looking for personal, diverse and inspiring stories about how offline Wikipedia affects the world. If you have a personal story that you would like to share, please contact: email@example.com. Thank you!
USB flash drives and memory cards are often formatted using the FAT32 filesystem which can't store files bigger than 4GB. Better use exFat, or any modern filesystem, and then you will be able to store big ZIM files.