OneDrive in Windows 8.1 uses a new technology named Smart Files. This allows you to access your files even though they are not fully copied on your PC or device and save disk space at the same time. However, some users won’t need this feature and they will want all their files available offline so that they can use them even when they are not connected to the Internet. This is possible and it implies turning off Smart Files. Here’s how it is done:
Step 1. Open the OneDrive App in Windows 8.1
This change can be performed only by using the OneDrive app in Windows 8.1. Start it by clicking or tapping its tile on the Start screen.
When loaded you will see your OneDrive folders and their content.
Step 2. Use the Settings Charm
With the app open, access the charms by pressing Windows + C or by swiping from the right.
Press Settings, then Options.
Step 3. Turn Off Smart Files
You will find only one switch that says "Access all my OneDrive files offline".
By default it is set to Off. Change its position to On.
This will turn off Smart Files and all your OneDrive data will be made available on your hard disk. However, you should be patient as OneDrive will need quite a bit of time to download everything on your computer. For example, I have more than 100GB of data and making it all available offline took about a day.
As you can see, making all your OneDrive files available offline is relatively easy. However, once Smart Files is turned off, the change won’t be performed immediately. Keep the OneDrive app opened in the background and be patient. If you have lots of files on your OneDrive, the whole process of downloading them will take quite a long time.