Locally Redundant Storage (LRS) is designed to provide at least 99.999999999% (11 9's) durability of objects over a given year . It keeps 3 replicas of your data within a single facility and within a single region for durability. It replicates your data within a storage scale unit which is hosted in a datacenter in the region in which you created your storage account.
A write request to an LRS storage account returns successfully only after the data has been written to all replicas. These replicas each reside in separate fault domains and update domains within one storage scale unit.