How to Open Email Attachments on Android Tablet
I'm unable to open email attachments on my Samsung Android device. How can I fix this?
                       If you're unable to open a specific email attachment please first ask the person who sent the email what format the attached file is in: Android cannot read all file types. Click here to see a table of the supported media formats for the different Android versions. If you can't open email attachments that are in formats your device recognises then you can probably fix the problem by removing the email account and then adding it again.                               Removing and re-adding an email account                                         These steps apply broadly to Samsung Android devices. The steps for your specific device may vary very slightly from those below.             1. From the Home screen touch                              2. Touch                              3. Touch the              Accounts              tab (you can skip this step if your Android version is 4.2 or older). 4. Touch the email account with which you are having problems. 5. Touch              Remove account. (You may need to touch              Account settings              first.) 6. If you received email through that account through an app you downloaded from Google Play or Samsung Apps proceed to              Settings > Application manager              and uninstall that app. 7. Add the account again as you did before. This will mean downloading the email app again or, if you weren't using a third-party email app, touching theAdd account              option beneath your other accounts on the settings menu, selecting              Email              and then following the steps on-screen. 8. Restart your device and then re-attempt to open the attachment(s) in the email message(s).                               Perform a software update                                         If removing and then re-adding the email account didn't work then follow these steps to perform a software update.             1. From the Home screen touch              Apps. 2. Touch              Settings              (you may need to swipe left or right to locate it first). 3. Touch              About device              (you may need to touch the              More              tab first). 4. Touch              Software update. 5. Touch              Update. 6. Restart your device and then re-attempt to open the attachment(s) in the email message(s).                               Perform a factory reset                                         If the software update didn't solve the problem (or no recent software update was available) try performing a factory reset.             1. Back up all the media, text messages, etc that you wish to save. This can be done through Kies on your PC. A factory reset will wipe your phone clean, restoring the software to how it was when the device left the factory. 2. From the Home screen touch              Settings. 3. Touch              Back up and reset. 4. Touch              Factory data reset. 5. Touch              Reset device. 6. Your device will restart. Finish the setup process on your device and then add the email account again. If you're still unable to open attachments with your emails after this it suggests an unusual fault with your device that requires an engineer's attention. Please click here to find the location and contact details of your nearest Samsung service centre. Apps.
Apps.            
Settings              (you may need to swipe left or right to locate it first).
            
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How to Open Email Attachments on Android Tablet
Source: https://www.samsung.com/africa_en/support/mobile-devices/i-am-unable-to-open-email-attachments-on-my-samsung-android-device-how-can-i-fix-this/