Paddy,
Thanks for the link... I agree with one poster there... it IS kinda "stupid" of Apple not to think of that... I thought it would be the perfect application for a portable drive. Easy to take along and use. Oh well...
I appreciate your advice, and I'm still looking and thinking. It seems everything runs with USB and the MBP only has 2 so a hub of some sort is really needed. I don't use my MBP for anything professional so I'm happy if I've got enough so as not to have to keep swapping stuff around to get at a port! I like the Seagate portables and there is also a Western Digital that I really like. The price is good on both.
Right now however yet another problem has cropped up with my MBP... I've got crashes everywhere... several apps keep crashing and the mail pref panel keeps pestering me for my mail password to enable this account... it IS enabled and running. I don't know if it's more unhappy that it doesn't like the password I chose for myself or that it keeps hounding for a "path prefix"... I'm sorry but I have no clue what or where it wants. It just keeps hounding me every hour or so. I had a look in Console and there are crashes all over the place including all the kernel panics I got trying to install the security update. I don't understand all the stuff in there but one can see things seem to keep tripping over what appears to me to be a completely overloaded with old files... especially in preferences in the home directory. There are some of the com.apple type that when installing updates never overwrite a preference plist file they just create another and leave empty ones with a bunch of number and letters attached. There are files in there from way back in 2005 to now... the older ones haven't been accessed since the same year they were created.
I despise sloppy software... and Apple seems to be taking the cake! I don't know what else to do but weed through 400+ files and remove obvious crap. Then there's the Preference directory not in the home directory... it's cluttered too but not as bad. Even the System Library is full of junk, but one doesn't dare do much there.
I dunno... hopefully I can de-clutter well enough and then maybe run the 10.11.6 Combo Updater to freshen things up and replace anything I may have messed up. Honestly, it reminds me of the Hoarders show on A&E... I can run OnyX to get rid of all the caches and crash logs but it'll still happen, but at least one can repair permissions with that.
Duh! I'm going to go away and do something else for awhile...
OH... I did boot into Recovery Mode and ran the Hardware Test. It all passed... all OK. The Test says that if your hardware is OK then it's software and I can see that. I have disconnected the external right now... later I'll reconnect it and run the test again.