The file systems in Linux, macOS, and other Unix-like operating systems don't use separate volume identifiers for storage ...
A filesystem is a way that an operating system organizes files on a disk. These filesystems come in many different flavors depending on your specific needs. For Windows, you have the NTFS, FAT, FAT16, ...
I have several Linux machines on my network, each serving a different purpose. I frequently need to transfer files back and forth between them, and I'd rather not do so via a cloud service, email, or ...