I would like to take a range of values from multiple workbooks and enter it into the next blank row of a master workbook. I’m trying to streamline this code as much as possible
Your referencing of objects is incorrect - you dont need to include the full "path" once you have set the Range objects:
Sub CopyData()
Dim wk1 As Workbook
Dim wk2 As Workbook
Dim sht1 As Worksheet
Dim sht2 As Worksheet
Dim Origin As Range
Dim Destination As Range
Set wk1 = Workbooks("Device")
Set wk2 = Workbooks("Pri Access Master")
Set sht1 = wk1.Worksheets(1)
Set sht2 = wk2.Worksheets("Device")
Set Destination = sht2.Range("D120000").End(xlUp).Offset(1, 0)
'EDIT - dynamic copy range
Set Origin = sht1.Range(sht1.Range("B2"), sht1.Cells(sht1.Rows.Count, "B").End(xlUp))
Destination.Resize(Origin.Rows.Count, Origin.Columns.Count).Value = _
Origin.Value
End Sub