What is the reason for not reading from the HDD storage disk?

hi

I have a Linux environment in which there are two disks to store data, one SSD and the other HDD, and I installed elasticsearch on the SSD disk and made a data storage path to the HDD disk, and it was normal and serves the purpose, after which the data abounded, so I decided to transfer the HDD to the SSD

For your information, this operation I did from a server, meaning that I transferred the disk with its HDD storage to an SSD server for speed

The problem is precisely
The problem is that when I monitor data from kibana, it appears to me that the remaining space is 90 GB, although I have not entered any data in this group yet, that is, it reads the data from the default path on the SSD disk, which is 100 GB

What is the cause of this problem?