Multiple catalogs

The problem is I have too many hard drives. Everything was ok; I had just one catalog per hard drive, which was manageable. The problem with Lightroom catalogs started when I changed the computer. I copied all the information about the Lightroom catalog from the old computer to the new one. I also got a new 8TB hard drive and created a new catalog. After that, Lightroom started making new catalogs and asking me for updates. I was jumping from one catalog to another, from one hard drive to another. I found out that I can't find the folders that I was working on and already had a huge amount of work done. I need help by helping me to get on the right track with all this mess I created.

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