Hi beachfeet, regret the delay.
I endorse pcpunk's comments above.
Got your PM, brainout is sweet and kind, but overly builds me up where Timeshift is concerned. I simply introduced it to the Forum 12 months ago (in a few days), as an alternative solution to those seeking answers to backing up their Home directories/partitions.
Following my suggestion, a number of our Members embraced TS as a tool in their lits for backup and cloning solutions … including “bad” Nick, lol (or at least he researched it, including its BTRFS capability).
brainout's reference to my encountering similar circumstances is not quite factually accurate, but can be read about here, if you are interested (reference TimNet)
To business. Some of the below you may know, some maybe not. I do not currently have a working version of Ubuntu (yet) on my new PC, but the information provided should be cross-Linux Distribution, if it proves not to be the case, someone could let me know and I will add that to my Knowledge Base.
For purposes of this exercise I have just downloaded and installed Timeshift (hereafter “TS”) and taken a couple of Snapshots.
TS, when installed, will typically take up residence under /usr/share, resulting in /usr/share/timeshift
However when you use it for the first time, it will:
Calculate the size of your first snapshot, in my case, 4.9GB and
Present you with a choice of Destination for Backup, typically default is the partition you are currently in on your internal HDD.
There, it will make its own directory /timeshift, where it will store folders named for types of screenshots.
Below illustrates, under my circumstances.
Under snapshots-ondemand, I have
… the first one, 4.9GB, took about 3-4 minutes to complete, and the second one only seconds, because nothing had effectively changed, but was about the same size. So you need to factor that storage overhead into your plans.
In my case, I changed the default Destination to my 3TB external HDD, rather than the internal.
I note from accessing your Profile, and recent Posts, that you have an external HDD.
Namely, at http://www.bleepingcomputer.com/forums/t/586994/external-hdd-not-allowing-pc-to-boot-attempted-solutions-listed/#entry3801980 - and it appears your circumstances mirror my own, nearly, a 2TB internal and a 3TB external. In that event, if your external solution is now trustworthy, it is your best bet for Timeshift storage, but that is up to you.
Timeshift settings can be tweaked to schedule events, in my case, when I was on Ubuntu, I had a weekly snapshot scheduled, and just took on-demand when I was installing new software, or undertaking a project that might entail risk. You can also set it to flush or cull old snapshots periodically, eg 30, 60, 90 days, you get the picture. Very much like Windows Restore in these regards.
beachfeet, it would be useful to know a little more of your circumstances, but I have to go away for a couple of hours and will outline more asap.
Tony George (author of Timeshift, Aptik, Selene and Conky Manager to name a few - he is based in India) has changed his website since last I visited
... he used to run a blog where he answered questions, take a look around the site, if you can get it from the horse's mouth, it is likely better than what I can provide.