Depending on how these files were Copied (and tested for useful purpose,
from the newly created archive on external storage drive) you may then be
able to drag originals of your personal created works to Trash and delete.
Clearing caches is not effective because these small files are re-created
by the System in order to access those files. So 'cleaning apps' can fail
and often only damage file systems. These can remove important files &
create new problems.
Avoid system-owned and other applications you may need to run and use
the Mac; and those used by the system behind the scenes. If you remove
these then other and bigger troubles could follow.
If your computer has been associated with an dedicated external drive for use
with Time Machine application, that's good for recovery/restore of Mac system.
• Apple OS X and Time Machine Tips - (from 2013 by J. Pond)
http://oldtoad.net/pondini.org/OSX/Home.html
A new backup with Time Machine could be glacial or super long to create, if
none were made before or not kept up. But may be as important as electricity.
To create and maintain several different types of system backups on separate
storage drives is always good. The kind of hard drive with its own power supply
is also good for use at home where portability is not an issue. Archival backups.
~ And should be of significant capacity to store much data. Often the larger unit
will have faster spin-rate rotational internal hard disk drives (7200-RPM & up)
and would be much larger than the internal hard drive's total capacity.
Storage drives can & do eventually fail. To attempt a budget for duplicate storage
and also time to learn and maintain them adequately is important part of digital use.
Perhaps another contributor may see your thread and offer an additional reply.
