I don't pretend to be even a novice at using attachments - we've never actually used them. From reading about them, I believe the attachments field type actually stores a series of file names and the actual files into what is known as a stream object, and there is a bunch of magic under the covers that keeps track of everything. The article Attach files and graphics to the records in your database gives some guidance on how to use them, but since we use SQL Server back-ends for data storage, as does Kwonzika, we don't consider them very useful.

If on the other hand you are using an Access .accdb back-end, then they might be a good choice. But aside from the LoadFromFile and SaveToFile methods there doesn't seem to be alot of how to use information available on attachments. And it's not obvious to me what the .Value property is actually storing - my guess is that it is the file name and some pointers to the magic backend where the file actually gets stored.