A method and system for providing file level restore (FLR) service for restoring one or more files stored in a plurality of file systems in a backup of a first virtual machine is provided. The method creates a FLR session for a user, including: creating a virtual disk file in a second virtual machine providing the FLR service, the virtual disk file including an empty file system being mounted as a root folder of a virtual appliance in the second virtual machine; creating a respective folder for each of the plurality of file systems under the root folder; mounting each of the plurality of file systems to the respective folder; and mounting the root folder to a folder of the second virtual machine. The method restores the one or more files by the user through accessing the folder of the second virtual machine in the FLR session.