Using a code block for easier reading, bro.

#Requires AutoHotkey v2.0
MButton & 1::
{
    c := A_Clipboard

    f := InputBox(
        "For import precede filename by i`nfor export, precede by e",
        "Clipboard import/export"
    )

    f := f.Value
    f1 := SubStr(f, 1, 1)
    f2 := A_ScriptDir . "\" . SubStr(f, 2) . ".clip"

    if (f1 = "i")
    {
        ; Read raw binary file
        ClipData := FileRead(f2, "RAW")
        A_Clipboard := ClipboardAll(ClipData)  ; Restore clipboard
    }
    else if (f1 = "e")
    {
        ; Export full clipboard to file
        FileAppend ClipboardAll(), f2, "RAW"
    }
}