I can think of two ways to transfer your saved album to your computer.
- Connect your phone to your computer with a USB cord. Make sure to set the USB mode to transfer files. Find the phone in Windows explorer and then navigate to the folder with the album. Copy and paste to your computer.
- Using the app on your phone navigate to the album. Click the video or picture and then click on the "Share" button. Click on "Upload to Photos". On your computer go to the Google photos web page and download the video or picture to your computer.