The phrase "actually beforehand" is correct and usable in written English.
It can be used to emphasize that something occurred prior to another event or action, often in a context where clarification is needed.
Example: "I thought we had discussed the plan, but it turns out you had actually beforehand made other arrangements."
Alternatives: "previously" or "in advance".
Ideally I'd like to whittle down the CDs to a couple of hundred at most and sell the rest, burning what I might actually listen to beforehand.
The seemingly spontaneous remark from the president, who said unprompted that he had "always wanted" to move the embassy to Jerusalem, was actually carefully vetted beforehand by American negotiators who had accompanied Mr. Clinton to Camp David, and came after Mr. Barak had specifically asked Mr. Clinton to raise the issue.
Anyone considering mushrooms should educate themselves on what they actually look like beforehand, to avoid being ripped off, or worse, poisoned.
Still, many people are like me, taking advantage of generous time-share previews with nary a thought beforehand to actually buying one.
Meanwhile, the New York Times columnist James B. Stewart says that Mr. Apotheker's firing isn't all that surprising, given that less than half of H.P.'s directors at the time of his hiring actually met with him beforehand.
They go to each house, getting goodies in exchange for not eating the children (though they already actually had eaten some beforehand).
I hadn't actually studied the program beforehand, but I did know the NIH was giving an announcement of some kind.
When Neubauer asked Ito to marry him, she replied, "Are you sure?" just to make sure he actually thought about it beforehand.
Eating something little beforehand can actually allow you to eat less when you're there! 3. Enjoy the Heck Out of That Pie If you decide to indulge in a piece of pie or two, make sure you actually taste it!
Ray's actually watched the clips beforehand, which is rare – even if he does go into full-on "yer da" mode at one point, moaning about the England team "poncing about" trying to be European.
