The first thing to do is transfer (copy) the contents of the camera and card to a fast hard drive, making sure to keep the entire folder structure of the card and camera intact.
I use now a fast hard drive with the Sony-program Content Management Utility or PMB. This imports the file to a general directory that I define myself.
After that I move the m2ts- and modd-files (and generated moff-files if they are there) to an other directory that I defined, because that fits in the structure of projects that I defined myself and use.
Do I lose information in this way which would enable Premiere do do the allocations in a fast way or so?
Is there a solution to solve this problem?
It's not a 'problem'. It's just the way software works. Premiere Pro needs to make sure the media is in the same location as when you closed the project.
Even with that many clips, it should only take a minute or so for the check to complete. If it takes longer, you may need to assess your hard drive situation.
The Sony program has caused problems for other users with Premiere Pro. I advise against using it. Instead, rename the assets inside of Pr's Projet panel after you've imported them.