This involves the concept of a "file system", suggesting that the file is too large because the file system of your USB flash drive is FAT32, and the file system of FAT32 can only accommodate a single file of 4GB, so it prompts you that the file is too large. The simplest solution is to back up the files on the USB flash drive, then format the USB flash drive, change "FAT32 (default)" of the file system option to "NTFS" in the formatted pop-up window, and then click Format. Files larger than 4G can be loaded. Handmade, if it helps you, please adopt it. Thank you.