Hello NASRAT, and welcome to Seven Forums.
How long does it do this before seeing the drives?
Using the tutorial below, double check to make sure that you have the Turn off hard disk after
power plan option set to Never
to prevent having a load delay when you open Computer. If this is the issue, then the delay is from waiting on the HDD to be turned back on and spin back up to full speed. Hard Drive - Turn Off Hard Disk After Idle or Never
Hope this helps,