A user experienced issues with a flash memory drive that was recognized by Windows but not by a Linux system. The drive was formatted with FAT32, which is compatible with both operating systems, suggesting the problem might be specific to the Linux machine. Suggestions included trying the drive on a different Linux computer and checking system messages using the command "dmesg | tail" to diagnose recognition issues. Another user faced challenges with emptying a flash drive on a Mac, mistakenly believing dragging files to the trash would suffice. It was clarified that files must be highlighted, dragged to the trash, and the trash must be emptied to free up space. The importance of proper file management and formatting was emphasized, especially when using different operating systems, as some drives may have their own operating systems that complicate usage.