I am using java software SeqMonk developed by a university in england. I have data on an external drive I want to access. However, when I go to that drive off of /Volumes/Seagat8TB (my external partition) I see no files. I have attempted to remedy this by going into preferences, security, privacy and adding the program to allow to use FULL DISK ACCESS. But it does not seem to do anything. I also looked for problems running a java monitor tool while trying to access the external drive. I do not see anything indicating a problem. It is like a lack permision somehow to read the external hard drive with the program. I can see the harddrive with disk utilities and go to the data using cd /. I contacted the software vendor and they have no idea what is causing the problem other than possibly something to do with gatekeeper and the latest mac os.