Cannot convert dynamic disk to basic disk in Disk Management
Sometimes, the dynamic disk users need to convert dynamic disk to basic disk. However, if you try to use Windows Disk Management to convert dynamic disk to basic disk, you will found that the Convert to Basic Disk option greyed out. Like the following screenshot shows:

Thus, you cannot convert the dynamic disk to basic disk here, unless you delete ll volumes on the dynamic disk. well, is there any way for converting dynamic disk to basic disk without losing data?
The best partition manager for Windows 10/8/7 to convert dynamic disk to basic
Fortunately, there is a way for you to convert dynamic disk to basic disk quickly and safely. that is using a third-party manager tool. Here we highly recommend AOMEI Partition Assistant Professional, which comes with the best dynamic disk converter for Windows 10/8/7.
It can be used on Windows 10/8/7/Vista/XP (both 32 and 64 bit) and Windows Servers.
It can safely convert dynamic disk to basic disk without losing data within 3~10 seconds.
It supports to convert GPT dynamic disk to basic disk.
It supports to change invalid or unreadable dynamic disk to basic.
It supports converting multiple disks to basic disks simultaneously.
It can ensure system bootable and data security during the conversion.
It supports converting multiple disks to basic disks simultaneously.
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Besides with so many amazing features, AOMEI Partition Assistant Professional provides an intuitive interface that you can use it to convert dynamic disk to basic disk without losing data quickly.
The steps of how to convert dynamic disk to basic disk with AOMEI Partition Assistant Professional
Install AOMEI Partition Assistant Professional to your Windows PC and launch it. And then, you can follow the steps below to convert dynamic disk to basic disk without losing data.
Step 1. Install and run this software. Click "All Tools" > "Dynamic Disk Converter" to launch this tool.

Step 2. Select Convert a dynamic disk back to basic disk and click Next.

Step 3. Choose the dynamic disk in the list. If the selected disk contains mirrored volumes, you need to check the option before clicking Next.

Step 4. Finally, you need to click Proceed to execute the operations.

AOMEI Partition Assistant Professional is such a simple and easy software for dynamic disk, if you would like to find a dynamic disk converter Windows 10, it is your best choice for converting dynamic disk to basic disk in Windows 108.1/8/7/Vista/XP.