I will try to help.
Some background: the reason that the lock appears is that files and directories have user and group attributes for permissions and you are not able to access them because the user id and group id (for the user) now do not match that of the files and directories you copied.
In a terminal if you type
you will see something like
drwxr-xr-x 2 1234 999 4096 May 14 14:49 Public
drwxr-xr-x 2 1234 999 4096 May 14 14:49 Templates
The number in the 3rd column is the user ID and the number in the 4th column is the group ID.
The fix for you is quite simple.
In a terminal type
you will get something like
uid=12345(somebody) gid=999(users) groups=999(users),94(floppy),96(scanner),98(power),983(wheel),984(audio),988(video),998(lp)
Note what you get back does not have to match the sample output in any way.
In the example above user id (uid) is 12345 and group id (gid) is 999
You can grant access to the files you copied earlier by using the chown comand (change file owner and group) to change the values to the uid and gid outputted by the id command,
sudo chown -R 12345:999 copy_of_home_directory
-R is for recursive application of chown. You can find out more about these commands by using the man command. For example
finally when copying directories for archival/transfer I usually use
The a is for archive which IMHO is useful.
Hope this helps.
Apologies if I have come across as too patronising, I have no idea regarding your knowledge of unix like OSes, so I’ve tried to write a response so that someone new to Linux can do what is required.