Update README

README.md

@@ -11,11 +11,25 @@ command).
 Usage
 ------
     drives: Print Windows drive and volume information
-    Usage:  drives [--json|-j] [--verbose|-v] [drive]
-            [--help|-h|/?] [--version]
+    usage : drives  [--json|-j] [--verbose|-v] [drive]
+                    [--help|-h|/?] [--version]
 
     This program prints drive information for all devices, network mappings, DOS
-    devices, and drive substitutions.
+    devices, and drive substitutions (via the `subst` command).
+
+    Unless the `--json` option is supplied, the following drive values will be
+    printed, in this order:
+
+        - Drive Letter
+        - Label
+        - Serial Number
+        - Type (No root, Removable, Fixed, Remote, CD-ROM, or RAM Disk)
+        - File System (for example, NTFS, FAT, or FAT32)
+        - Volume GUID, drive substitution or target, or network mapping
+
+    The volume GUID can be used in a formal volume name, with the following form:
+
+        \\?\Volume{GUID}\
 
     Options
         [drive]
@@ -31,24 +45,31 @@ Usage
             GetVolumeInformationW().
 
         --verbose, -v
-            Print additional information. This switch is ignored if the `--json`
-            option is supplied.
+            Generally, print additional volume information. This switch is ignored
+            if the `--json` option is supplied. Additional volume information
+            includes the amount of free space and the total drive capacity.
 
         --version
             Print program version.
 
+    drives 3.0.0-alpha.4 | 2022-04-22 | https://github.com/hollasch/drives
 
 Sample Output
 --------------
+
     C:\> drives
-    A: "Data"     69cc-bf14  Fixed     [NTFS]
-    B: "Backup"   182b-29c2  Fixed     [NTFS]
-    C: "System"   cf99-12f4  Fixed     [NTFS]
-    D: "USB"      a0f3-59a6  Removable [FAT32]
-    H: "NASStore" 9f8b-fd0f  Remote    [NTFS]  --> \\common\files
-    R: -          -          CD-ROM    -
-    T: "Data"     fa6f-f71d  Fixed     [NTFS]  === A:\setup
-    X: "Scratch"  4fdd-258e  Fixed     [NTFS]  === C:\Users\Fred\scratch
+    A: "Data"    69cc-bf14  Fixed      NTFS    0f355eb5-6b2d-4583-8c15-350f09a59add
+    B: "Backup"  182b-29c2  Fixed      NTFS    65b25216-ace2-4bc0-a768-00cd5ce46082
+    C: "System"  cf99-12f4  Fixed      NTFS    c25514ce-c902-460a-aee5-a15d63e154ca
+    D: "ESD-USB" a0f3-59a6  Fixed      FAT32   ca8f1d7e-f70c-40c3-b71f-6aad1b4f4848
+    E: -         9f8b-fd0f  Removable  FAT32   2b3413e6-3be6-4376-8d46-282aed06561b
+    F: "Data"    fa6f-f71d  Fixed      NTFS    === A:\setup\tools
+    G: "Games"   4fdd-258e  Fixed      NTFS    b4f4619b-838c-484e-96f8-05a1bfd96a7a
+    R: -         -          CD-ROM     -
+    S: "Scratch" 0083-3922  Fixed      NTFS    ce38d56e-b4c0-477f-b77c-866b629c0c87
+    V: "NAS3"    7f10-6416  Remote     NTFS    --> \\common\files
+    X: "Data"    2175-ff77  Remote     NTFS    --> \\klaatu\a$
+
 
 Building
 ----------