“Hey, installed Windows 10 OS on Local Drive C with 150 GB Space allocated to it, but not I need to increase the space of the C Drive. Query 1: How to expand a partition without formatting? Windows User Problem – Extend Partition Without Erasing Data We also discussed some tips before you start the process of extending the partition. We user Manual solution offered by Microsoft to increase the size of the desired Drive for better performance. In this article, we discussed methods that can help you to extend a partition without losing data and without any utility software. How to Recover Data Loss During Extending Process?.How to Fix “Extend Volume” Grey Out Issue.Command Line – Diskpart How can I extend my C drive in Windows 10?.Partition Via Disk Management In Windows 10 Extend Partition.User Problem Regarding Unable to Extend Partition Extend.