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README.MD

@@ -1,7 +1,7 @@
 # LUKS-Encrypted Disk Images on Linux
 
 ## Using your package manager: (apt, etc...) install the following:
-## Requires: cryptsetup [Exmaple:$ sudo apt install cryptsetup]
+## Requires: cryptsetup [Example:$ sudo apt install cryptsetup]
 ## As well as: losetup, mount, umount, findmnt, blkid
 ## Optional: VBoxManage (VirtualBox), virsh (libvirt)
 
@@ -43,6 +43,17 @@ sudo luks-img.sh add-key --file mydisk.img --keyfile /path/newkey --existing-key
 When Done - Repeat step #2 to CLOSE
 ```
 
+## How to make a Compressed backup:
+```
+zstd -19 -T0 mydisk.img
+```
+## How to use the backup:
+```
+First close the image from step #2, then:
+mv mydisk.img mydisk.old.img
+unzstd mydisk.img.zst
+```
+
 ### If you want to add the image file to a VM:
 
 ## Virtual Box: