How to Attach Files to Posts
I thought a little bit of explanation on how to attach files might be warranted since many newcomers seem to struggle with it. I searched before posting this but all I found was more people with problems but not much on how it's done. IMHO, it's not all that intuitive for newcomers.
At present, the file size limit means that most database files must be zipped. It usually helps to perform the compact/repair function on your db. This might raise a compile error if, for example, you have missing references in your code project.
First, I suggest you place your cursor in your post where you want the attachment to go. Then click the Go Advanced button.

You should then see an advanced view with a tool bar which contains an attachment button. Click on it.

As the #1 instruction says, click Add Files to upload your db or image. There is a "container" below what I've shown here that holds all the past files you've uploaded. I have clipped this, but it will be visible in a following image. While it's suggested that you can insert an attachment into your post from this collection, I have never tried to do so. As a first time uploader, your collection space will be empty.

To upload a new file, click the Browse button

A file system dialog should appear where you then navigate to the file you wish to upload. I have found that multi select is not supported here.

In a post like this one, you will find that only 5 attachments are allowed, so I will attempt to continue this in a subsequent post.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.