One of the advantages of converting to a dynamic disk is that you can extend a simple volume. This means if you have additional free space, you can use it to extend an existing simple volume without losing any data.

Before you attempt to extend a simple volume, there are a few things you need to keep in mind. A primary partition becomes a simple volume when the disk is converted from basic to dynamic. However, if the simple volume was created before the disk was converted to dynamic it can not be extended. A simple volume can only be extended if the simple volume was created after the disk was converted to dynamic. A simple volume that was originally a primary partition can not be extended and you can not extend the system or boot volume.

To extend a simple volume:

1. Click Start and click Run.

2. Type mmc and click OK.
3. Click Add/Remove Snap-in from the File menu.
4. Click Add. Select Disk Management, click Add then Finish, and click Close.
5. Click OK.
6. Click Disk Management (Local) in the left pane.
7. Right click the simple of spanned volume that you want to extend. Click Extend Volume.
8. Select the disk that the volume will be extended to and click Add.
9. Specify the amount of space to add to the volume. Click Next.
10. Click Finish.