common: add MAV_CMD_SET_STORAGE_USAGE

message_definitions/v1.0/common.xml

@@ -1657,6 +1657,15 @@
         <param index="4" reserved="true" default="NaN"/>
         <param index="7" reserved="true" default="NaN"/>
       </entry>
+      <entry value="533" name="MAV_CMD_SET_STORAGE_USAGE" hasLocation="false" isDestination="false">
+        <description>Set that a particular storage is the preferred location for saving photos, videos, and/or other media (e.g. to set that an SD card is used for storing videos).
+          There can only be one preferred save location for each particular media type: setting a media usage flag will clear/reset that same flag if set on any other storage.
+          If no flag is set the system should use its default storage.
+          A target system can choose to always use default storage, in which case it should ACK the command with MAV_RESULT_UNSUPPORTED.
+          A target system can choose to not allow a particular storage to be set as preferred storage, in which case it should ACK the command with MAV_RESULT_DENIED.</description>
+        <param index="1" label="Storage ID" minValue="0" increment="1">Storage ID (1 for first, 2 for second, etc.)</param>
+        <param index="2" label="Usage" enum="STORAGE_USAGE_FLAG">Usage flags</param>
+      </entry>
       <entry value="600" name="MAV_CMD_JUMP_TAG" hasLocation="false" isDestination="false">
         <description>Tagged jump target. Can be jumped to with MAV_CMD_DO_JUMP_TAG.</description>
         <param index="1" label="Tag" minValue="0" increment="1">Tag.</param>