You need to change the permissions/ownership of them. Since you copied the files over as root, they are almost certainly owned by root, which is why your ordinary user can't read them.
The first thing to do is check the file permissions and ownership; this is most easily achieved through a terminal. Once in a terminal, navigate to the directory where the files are stored using the cd command. Once there, type ls -l and check the 1st and 3rd columns. The first shows the permissions for owner, group and others, the third column is who owns the file.
To change the permissions, you need to use the chmod command. To change the ownership, use the chown command. Both need to be run as root if root currently owns the files.
edit: beaten to the punch!