What file system is likely being used if a backup exceeds the file limit after 4GB?

FAT32 is a file system that has a maximum file size limit of 4GB. This means that any single file cannot exceed this size when stored on a FAT32-formatted volume. Therefore, if a backup exceeds the file limit after reaching 4GB, it indicates that the file system in use is likely FAT32, as it cannot accommodate any files larger than that limit.

In contrast, NTFS (New Technology File System) supports much larger file sizes, generally up to 16 exabytes, making it suitable for handling large files without running into this limitation. VMFS (Virtual Machine File System) is used in VMware environments and supports large files as well. ZFS (Zettabyte File System) offers a high level of data integrity and scalability and also supports large file sizes, far exceeding the limitations of FAT32.

Thus, when a backup exceeds the file limit at 4GB, it is a clear indicator that FAT32 is the file system that is being used.