All the alternatives you have suggested are quite well-trodden paths that FH users have employed.
Regarding cloud storage there is a free allowance on each service, beyond which you must pay:
Dropbox = 2 GB
OneDrive = 5 GB
Google Drive = 15 GB
Everything in your Family Historian Projects folder would have to fit within one of those allowances.
But other document folders for other purposes can go on another cloud service and all those services can run simultaneously.
They all have configuration settings that ensure local disk copies will exist on both of your computers as well as in the cloud store.
So, yes you will be able to operate perfectly well without Internet access and then resync once the Internet connection is restored.
There is advice in the FHUG Knowledge Base on how to set up all those three cloud services.
However, if you are comfortable with using a USB pen drive, then why not continue.
As long as you are happy with your backup regime, then device failure should not be a problem.
An important part of such a regime is to check from time to time that the backups will restore your data, as it will be too late after a device fails.
If you have any further questions then do ask.
Regards, Mike Tate
Hello and thanks in anticipation ....
I have been using FH for some years now, keeping the Projects on a USB pen drive, so that I could use the software on whichever of my two computers was the most convenient at the time, simply by walking from one room to the other with the pen drive. This had worked admirably for a long time. However, yesterday the pen drive died. Fortunately I was in the habit of backing the whole drive up quite frequently and (of course) backing up the Family Historian Project on exiting the programme every time, so there are many backups on both machines and also on Backblaze, so I don't think I will have lost much.
However, looking to the future I am wondering the best way forward. Should I buy another pen drive, invest in a network-accessible piece of hardware, sync the two computers using something like SyncToy or go for the 21st Century & try to work out how to do it (safely) via GoogleDrive / Dropbox/ other clouds?
Before that nice lady whose name I've forgotten starts asking - I have several Projects, the largest of which is nearly 7GB, all my media is stored within the Projects (as well as separately on a hard drive connected to only one of the computers), I am OK with simple IT but have not dabbled with clouds (other than using Dropbox simply to transfer files from my tablet to a computer) and I do not wish to sync everything on my computers, only really the family history stuff plus some holiday & hobby stuff which it would be useful to be able to access. These files run to another 34GB. So it looks like I shall need min 42+GB of space.
I would be happy(?) to subscribe to GoogleDrive to get more space there but before so doing I would wish to be assured that in the event of an internet outage I would still be able to access my files, even if only on one computer, until the internet was restored. I would also want to be able to take my laptop out of the house, probably away from all internet access, and still be able to use the FH programme & to sync once I had returned home. My knowledge of such things is woefuully inadequate but having followed the conversations on this group.io I can see that there are many learned & patient people who will be able to put me straight & recommend & explain in simple layman's language what best to do next.
So I look forward to your response(s)!
Cheers - Cathy