External drive broke, path change not allowed

For Sonoma then your file system used must be APFS.

it's just the three of them that I had saved on my external driver. Now, I cannot add them again to a different location because my external driver has broken and I can't access it anymore. I am expecting to get new licenses for them since I paid for them and I cannot access my files of those libaries.

There must be some misunderstanding here. The fact that your external hard drive breaks down has nothing to do with N.I. . If you bought some software or libraries from N.I. then your software license is still yours.

You should be able to see any serials connected with your account on the MY PRODUCTS, SERIALS, AND DOWNLOADS page , listed as either Not registered or as Registered Products. If a product shows on your account as registered but does not show in Native Access then that is another problem.

Otherwise, what would you do? Because everytime I try to change the location of them it says that it cannot find the files (because my external driver doesnt work anymore)

Perhaps this is the misunderstanding here? Your real problem appear to me as if Native Access still thinks that the three products are installed and when you try to change the path then you get an error that it can not do that. but that is another entirely different problem. That is some internal info that needs to be reset.

Try removing the following files if there (instead of 'Product Name' then insert the name of each of the three missing products from external drive and remove them ) :

Application Files

Macintosh HD > Applications > Native Instruments > *Product Name* (folder)
Macintosh HD > Library > Preferences > com.native-instruments.*Product Name*.plist
Macintosh HD > Users > Shared > Native Instruments > *Product Name* > *Product Name*.json

App-specific Data and Support Files

Macintosh HD > Library > Application Support > Native Instruments > *Product Name* (folder)
Macintosh HD > Library > Application Support > Native Instruments > Service Center > *Product Name*.xml

Macintosh HD > Users > Shared > Product Name

If that doesn't help then also try removing the token and XML's from the trouble-shooter here : My Products Are Showing As DEMO in Native Access , especially '2. Your activation fails because of corrupted or missing
activation tokens' and '3. You have corrupted XML files' (delete both NA XML and offending product XML)

If that does not help then please contact N.I. Native Access and Installation Support

At the page N.I. Native Access and Installation Support be sure to scroll down to page bottom to see if there is a log-in request , if there is then log-in , at next page again scroll down and small blue chat box ought occur within 15 seconds. Then write in chat box and when getting suggestions then select did not help when it didn't , that ought to bring you on to either chat with human or open a ticket.

There has been introduced chat support for Native Access assistance (at least daytime on normal work days) :

Please refer to the page : How to get in touch with our Customer Care or read my Support page functionality changes post here