BrightSign Object Reference Manual (FW 5.1) - Manual (Page 166)

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roStorageHotplug
This object provides roStorageAttached messages when storage devices appear and roStorageDetached messages
when storage devices disappear. Currently, only external USB devices are supported, and there is no way to poll for
media.
Object Creation: The roStorageHotplug object is created with no parameters.
CreateObject("roStorageHotplug")
Interfaces: ifSetMessagePort
The ifSetMessagePort interface provides the following:
• SetPort(a As Object)
In order to avoid race conditions at startup, you should check for any storage devices that might have existed prior to the
message port being set. We recommend doing this after the object is created and the message port is set, but before
instructing the script to wait for any events.
Example
Sub Main()
mp = CreateObject("roMessagePort")
sh = CreateObject("roStorageHotplug")
gpio = CreateObject("roControlPort", "brightsign")
sh.SetPort(mp)
gpio.SetPort(mp)