add backup related types and cmd arguments

- fix some typos & format

src/storages/directory.rs

@@ -30,7 +30,7 @@ impl Directory {
     /// - `name`: id
     /// - `parent`: where the directory locates.
     /// - `relative_path`: path from root of the parent storage.
-    /// - `notes`: supplimental notes.
+    /// - `notes`: supplemental notes.
     fn new(
         name: String,
         parent: String,

src/storages/physical_drive_partition.rs

@@ -192,7 +192,7 @@ pub fn select_physical_storage(
     device: Device,
 ) -> Result<PhysicalDrivePartition> {
     trace!("select_physical_storage");
-    // get disk info fron sysinfo
+    // get disk info from sysinfo
     let sys_disks =
         sysinfo::System::new_with_specifics(sysinfo::RefreshKind::new().with_disks_list());
     trace!("refresh");