Create a scheduled task to limit maximum ShadowCopy size to 15% of your drive. Also create (2) scheduled tasks to create shadowcopies at 10am and 4pm.

Create-ShadowCopyScheduledTasks.ps1

Import-Module ScheduledTasks

$runas = New-ScheduledTaskPrincipal "System" -LogonType ServiceAccount


$TaskName1 = "Set ShadowCopy Size Limit to 15%"
$action1 = New-ScheduledTaskAction -Execute "C:\Windows\System32\vssadmin.exe" -Argument "resize shadowstorage /for=c: /on=c: /MaxSize=15%"
$trigger1 = New-ScheduledTaskTrigger -Daily -At "8:00"

Register-ScheduledTask -Action $action1 -Trigger $trigger1 -TaskName $TaskName1 -Description "Set the maximum amount of space used by ShadowCopy to 15%" -Principal $runas


$TaskName2 = "Create ShadowCopy @ 10AM"
$action2 = New-ScheduledTaskAction -Execute 'C:\Windows\System32\wbem\wmic.exe' -Argument "shadowcopy call create Volume=C:\"
$trigger2 = New-ScheduledTaskTrigger -Daily -At "10:00"

Register-ScheduledTask -Action $action2 -Trigger $trigger2 -TaskName $TaskName2 -Description "Created ShadowCopy for C:\" -Principal $runas

$TaskName3 = "Create ShadowCopy @ 4PM"
$action3 = New-ScheduledTaskAction -Execute 'C:\Windows\System32\wbem\wmic.exe' -Argument "shadowcopy call create Volume=C:\"
$trigger3 = New-ScheduledTaskTrigger -Daily -At "16:00"

Register-ScheduledTask -Action $action3 -Trigger $trigger3 -TaskName $TaskName3 -Description "Created ShadowCopy for C:\" -Principal $runas