When your small business is closed, ensure that your callers know that! If appropriate, you might want to reiterate your business hours to manage callback expectations.
If you are recording a voicemail message for business, be sure you include your name and your company’s name, so people know who they are calling and were they are reaching them. If you do not include the business name, they may think they have mistakenly called you at your personal number. Step One: Introduction. Start with an upbeat greeting that includes the name of the person you’re calling: “Hi, Tim!” “Hello, Susan!” “Good morning, Tom!” Then, introduce yourself by giving your name, company name if applicable, and telephone number. Step Two: Message. Step Three: Recap and sign off. What is a professional voicemail greeting?

Context does matter here. If the caller would reasonably expect you to answer the phone (such as if they were calling a store or other place of business), an apology for not being able to get to the phone makes the most sense.
I have an old picture frame voice recorder that had a cherished voice recording on it. It was accidently deleted yesterday. Is there any way to retrieve the old recording? The recording and play button were pressed several times thinking the recording might possibly work again, but no recording was added. Is it possible to retrieve that old recording or is lost forever?