Hi,

The issue isn't with nested content, but rather that you have a custom media picker, so uSync doesn't know that the property contains media or how it is stored 🙁

To tell uSync about the custom media property - you need a class that implements the ISyncMapper interface.

you can see the existing mappers that ship with uSync in the source : https://github.com/KevinJump/uSync8/tree/v8/dev/uSync8.ContentEdition/Mapping/Mappers

for example the UdiPickerMapper handles mapping media/content when the picker stores the UDI values in a list.

If the custom mapper does the same, you could inherit this class and change the editor value to match the alias the custom mapper uses.