Hi,
Thank you for posting your query. Here are some links related to VHDX best practice you can refer to.
Best Practice Tips for VHDX / VM Storage Hyper-V 2012
https://community.spiceworks.com/topic/2094013-best-practice-tips-for-vhdx-vm-storage-hyper-v-2012
What is best practice for creating shared storage VHDx files?
https://community.spiceworks.com/topic/1132014-what-is-best-practice-for-creating-shared-storage-vhdx-files
Hyper-V Storage Best Practices
https://www.nakivo.com/blog/hyper-v-storage-best-practices/
Hyper-V Storage Best Practices and Configuration
https://www.altaro.com/hyper-v/hyper-v-storage-best-practices-configuration/
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