Lightroom Classic is very slow or does not open photos from the catalog on different drives

Hello.
I have a problem with Lightroom Classic, which is not able to open photos from previous years that have already been added to the catalog, and works perfectly before. It tries to access them but it is very slow or it doesn't even open them.
The PC should be more than enough and I explain how it is configured:
Intel Core i9 14900k (new, not damaged by anything previous), ASUS ROG Maximus Z790 Hero (latest Bios 2703 with all Intel patches), 64 GB of 6200 Mhz memory, SAMSUNG SSD NVMe 990 PRO 2TB (WIN 11 and programs), SSD NVMe 2TB (here is only the Lightroom catalog and it is also used as a virtual drive for Photoshop to use), SSD 1TB (photographs from the current year), HD 6TB with previous years.
If  I'm working with the current year (the 1TB SSD) and I don't leave that unit, there's no problem (close open Lighroom perfectly) , but although it's not very fast (and look at the PC that it is). The problem comes when I want to go to photos that are on another unit (the 6TB HD, although it also happens with another external one that acts as a backup, it doesn't matter which disk it is...).
The catalog consists of about 120,000 photos, where their thumbnails etc. were already created at the time and all the photos cataloged.

When accessing any folder on those other disks, Lightroom recognizes the number of photos there are, but shows the photo number but without showing anything on it. The SSD unit that contains the catalog is set to 100% activity, but without doing any reading/writing, it is at zero, but at 100% activity.
After a long wait, some photos may start to appear, but everything is very very slow, and practically without letting you do anything on it. The microprocessor is at 12% or less activity (it doesn't even notice...). The RAM is at about 40% occupied.

When closing Lightroom, it always tells you to check the integrity of the catalog, and it doesn't indicate any problem. If you start Lightroom on the last drive that the program was closed on and everything is OK, it opens without problem. The problem appears when you try to change to photos that are on a different hard drive than the one that was there when the program was closed.

I add screenshots of examples:
Nº1 -> It is how I get after waiting a long time for it to show some photo, it recognizes that the photo exists and is there, but it does not show it or let me do anything on it.
Nº2 -> Disk where I want to access the photos. NOTE: The same thing happens with any other disk that is not the last one that was worked with in Lighroom. When closing Lighroom, the integrity of the catalog is always checked, etc.
Nº3 -> It is the disk that contains the catalog, an SSD capable of reading/writing more than 3000 MB/sec and very high IOPs, at 100% activity without performing any readings or writings.
Nº4 -> The Lighroom process almost without activity.
Nº 5 -> The memory occupied at this moment by Lighroom. In "normal" occasions it has no problem in accessing the total possible memory close to 100%
WHAT CAN BE DONE?