If youre using your facebook app on your mobile phone , you will need to open the website to your third party browser like Google Chrome or Safari to be able to download files.

Step 1
- Tap the Menu (3 dots on the top right corner) .

Step 2
- "Copy link" , and paste it on your browser , or click "Open in Chrome/Safari".

Step 3
- Select the Unit you desired to download the sample computation.