This post is longwinded. Apologies.
I am sorry if this query has been answered before, I am about to make a hard drive purchase to store some Lr photos and wanted to be clear what I am doing is a correct and/or whether I have to do some tidying up work before attempt to move my photos. I am a novice user, so please pardon my ignorance.
I am running Lr CC (2015) on a MacBook Pro (Retina, 15-inch, 2013) running El Capitan 10.11.6.
I am starting to accumulate a large number of photographs on my laptop that I would like to store on 2 4TB external hard drives - the second being a back up for the first. I want to move my photos to the hard drives and still be able to see them in Lr CC (2015) on my and work on them on in Lr CC my laptop once they have been moved.
My photos are currently in the Pictures folder on my Mac: Pictures> 2011, 2012, 2013, 2014, 2015 and 2016
I am about to copy the photos to the first hard drive. And I want to make a copy of that hard drive on a second hard drive as the photos are very important to me.
If I copy the folders to my first LaCie 4TB hard drive:
1) What formatting do I need to make on my HDs to work with Lr and Mac?
2) Do I simply copy the folders to a folder I create on the hard drive that I call Pictures, like the folder name on my laptop? And then make a copy of that hard drive in its entirity on my second drive using backup software that comes with my drives?
3) One of my problems at the moment: I do not understand what files such as iPhone photos-2.ircat .... mean and I seem to have many of them scattered in many locations? Do I move some or all of them, leave them where they are or duplicate them all to the hard drive?
For example, they can be found in the location:
My name>Pictures>iPhone photos>Backups>2014-07-21 0150>iPhone photos.lrcat .... and so on
Other files exist called iPhone etc are zipped files
My name>Pictures>iPhone photos>Backups>2014-07-21 0150>iPhone photos-2.Ircat.zip dated 10 July 2015 at 21:19 for example
and there are other files:
My name>Pictures>iPhone photos>Backups>2014-07-21 0150>
called Lightroom Catalog.Ircat dated 27 August 2015 at 17:30
There is also a folder called Lightroom
Inside of that there are 4 items:
a folder called Backups
and four files called
Lightroom 5 Catalog Ircat
Lightroom Catalog Previews.lrdata
Lightroom Catalog Ircat.zip
Why do two files refer to Lr 5 and not Lr CC?
Do I move all of them to my hard drive at leave them in the locations where I found them and delete them on my laptop and then make a second back up of that hard drive?
I have never understood why there are all these files such as Catalog Ircat exist or what they mean? Have I somehow made a mess that I should spend time on before the transfer?
I would like to know how to proceed before I transfer the correct files so that I can view all my files and use all my on the external hard drive that I am moving to win space on my laptop and have the security that they are backed up by a second hard drive. I also have a Time Machine wireless HD back up for my laptop that I am intending to continue using after transferring my photos to the external drive plus backup drive.
Sorry to be longwinded - it's just that I really don't know what to do next and wanted to supply as much information as possible.