Asynchronously copying files

Scripting Forums AppleScript | Mac OS X
#1

Dear all

I want to copy files from a local folder to multiple USB sticks. The following script does just that but it does it one stick after the another. I’d like to rather copy files asynchronously to save time.
Am I doing it wrong, is this a limitation in Applescript or is this a problem unrelated to Applescript?

tell application "Finder"
	
	set StartupDisk to name of first disk whose startup is true
	set EveryDisk to name of every disk
	set EligibleDisks to {}
	set source to alias "MY:SOURCE:PATH"
	
	repeat with EachDisk in EveryDisk
		if EachDisk is not in {StartupDisk, "home", "net", "Backup", "Time Machine Backups"} then ¬
			set end of EligibleDisks to EachDisk -- Eligible for dismount
	end repeat
	
	choose from list EligibleDisks with prompt "Please choose one or more volumes." default items EligibleDisks with multiple selections allowed
	set ChosenDisks to the result
	
	if class of ChosenDisks is boolean then
		-- User Canceled
	else
		repeat with EachDisk in ChosenDisks
			ignoring application responses
				with timeout of 900 seconds --15mins
					duplicate every item of source to EachDisk with replacing
				end timeout
			end ignoring
		end repeat
	end if
end tell

Thank you for your help!

#2

I am pretty sure that the only way you can do asynchronous work of any kind is via Objective-C or Swift. There may be a UNIX solution out there, but I have no idea.

#3

For a do shell script solution I have written a small tutorial a long time ago to use backgrounding in AppleScript-Studio. Still you can use the same technique for using and handling multiple shell scripts asynchronously.