This article extends Google's article on transferring files between your Android device and your computer. I will repeat the primary information of that article here.
First, follow either 1A for Apple computers or 1B for Windows computers to open up the Android file explorer.
1A) To open files on an Android device from your Apple computer
Your computer must be using Mac OS X 10.5 and up.
Download and install Android File Transfer on your computer.
Open Android File Transfer. The next time that you connect your phone, it opens automatically.
Unlock your phone.
With a USB cable, connect your phone to your computer.
On your phone, tap the "Charging this device via USB" notification.
Under "Use USB for," select File Transfer.
An Android File Transfer window will open on your computer
1B) To open files on an Android device from your Windows computer
Unlock your phone.
With a USB cable, connect your phone to your computer.
On your phone, tap the "Charging this device via USB" notification.
Under "Use USB for," select File Transfer.
A file transfer window will open on your computer.
2) File extraction
When you have successfully connected your device, you should be able to open up the storage of your device as seen in the picture below. Look for a com.spatialnetworks.fulcrum folder and open it up
Go into files/attachments in order to see the media used by the Fulcrum app. You will find a variety of files, and can extract any of them to your computer by dragging them to your desired location
Note: if you have created a database backup, you can find it under files > backups