The process in using the computer, as a need, you may need to learn and understand related knowledge about the basic disk and dynamic disk. One day, in the case of carelessness, your basic disk was converted to dynamic disk accidentally. Then a few months later, you find dynamic disk can not meet your other needs, at this time, you may want to convert it back to a basic disk. The following is an example.
"I accidentally converted my disk to dynamic disk. I thought that I could convert it back to basic, but I thought wrong because I was trying to make a partition to have a dual boot system. I have created a recovery disc before it happened. I fear of reinstalling My OS as I have not operating system installation disc. How can I convert a dynamic disk to basic without deleting my data in my hard drive?"
As stated in that Microsoft TechNet article, you have to delete all volumes from that dynamic disk to convert it back to basic disk and then you can repartition the disk. So if you convert it back to basic, you will lose all your data from every volume. Besides, you can not delete the system/boot volume (where the OS resides) unless you're booting system from a CD/DVD or other disks. This means that you have to spend a lot of time to deal with annoying problem about this change back to the basic disk.
Now, however, fortunately, you can use Aomei Dynamic Disk Converter to easily solve this problem. Its main feature is to directly and safely convert a dynamic disk back to basic disk without loss of data. For invalid dynamic disk and unreadable dynamic disk, the tool can also deal with such issues. As many users of the recommendation, Aomei Dynamic Disk Converter is the best choice for solving such conversion problems.
1. Launch Aomei Dynamic Disk Converter and skip a welcome page, and you will see its main window below:

2. All dynamic disks will be shown in the following list box, please select the dynamic disks which you intent to convert. In instance, the Disk 1 and Disk 2 will be converted, and click the Next button to continue.

3. Then, you will see the screenshot below, the program prompt you confirm the conversion from dynamic disk to basic disk:

The process is easy and safe; revert to basic disk without deleting partition or losing data by using Aomei Dynamic Disk Converter.
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Tips: After converting dynamic disk to basic, you can manage your basic disk partition with Aomei Partition Assistant: