OS (C:) Supposed to be 900+GB but now Only 97GB

[PamPV]

After I did A factory reset. My Hard disk shrunk. on my Computer it only says my capacity is about 97GB but when I check disk Management or Partition software such as EaseUS Partition master I have 914.57GB I don't know what happened or what to do

PS. I just saw on EaseUS Partition master that 845.38GB is unused in disk management it doesn't indicate anything

 

[samuria]

Welcome to the forum if you could post a screenshot from disk manager but you should be able to grow the partition or add new ones for data

 

[PamPV]

If you can see this is my dilemma I am not tech savvy so guidance is appreciated thank you (I literally have to google everything)