Abstract: The disclosed computer-implemented method for efficiently moving data within a filesystem may include (1) partitioning, on a storage device, physical address space of a filesystem into a plurality of logical partitions, (2) allocating, on the storage device, at least one container of data block identifiers representing data blocks for each of the logical partitions, (3) maintaining, on the storage device, a partition map of values identifying the container of data block identifiers, the logical partitions, and at least one offset associated with each of the logical partitions, (4) sending, on the storage device, the data blocks from a source logical partition within the logical partitions to a target logical partition within the logical partitions, and (5) updating, on the storage device, the partition map based on the data blocks sent from the source logical partition to the target logical partition. Various other methods, systems, and computer-readable media are also disclosed.