Can I transfer Time Machine data from two separate hard drives into one new one?
I'm using a MacBook Pro as my primary computer. My 500 gig Time Capsule filled up a year or so ago, so I stopped using it with Time Machine for awhile so I could keep the data from those old back-ups. There were a number of things I deleted from my computer's very limited hard drive after they were backed up to the Time Capsule. I got a 1T external USB drive last year to use as my "filing Cabinet" to store files I didn't necessarily need all the time or that were filling up my small laptop hard drive--including my iTunes library--all organized in a way that made it relatively easy for me to find what I needed, even if I didn't remember exactly when I'd filed it or what I'd called it. I got another 1 terabyte external (portable) drive last July and dedicated it to TimeMachine backups and labeled it "TimeMachine".
Over the last couple of weeks, my friend has been helping me upgrade to Yosemite and clean up my laptop hard drive. Last week he cloned my laptop hard drive to a new 1T hard drive and I exchanged it for my old drive in my computer today. All good.
Here's the issue. We replaced my Time Capsule hard drive with a 1 terabyte drive with the idea of transferring the data from the old Time Capsule (500G) drive and the newer USB 1T "TimeMachine" compact drive to the new 1T Time Capsule drive and beginning using the latter for my Time Machine backups going forward. Originally he thought we could copy everything from each of my external drives (the old 500gig drive from my Time Capsule, the USB "TimeMachine" drive I've been using since July, and the "file cabinet" files) to my computer in their own folders and then start regular TimeMachine backups to the new Time Capsule drive, thus preserving all my old data and making regular backups going forward. The "file cabinet" data was no problem at all, but when I tried to copy my USB "TimeMachine" data to my computer, I was unable to. My friend found instructions for transferring old TimeMachine data to a new TimeCapsule, but I don't know if I can transfer the data from two separate disks to the new TimeCapsule drive. I'm afraid that one set of data will supersede the other and either my newer backups or my old ones will be lost if I try to transfer both.
Are my fears justified or is there a way to insure that no such problem will occur? Of course, my data will still be on those two older drives, but that won't do me a lot of good if I can't access it when I need to. Also, the 1T drive now belongs to my friend; he used a brand new drive he'd bought for himself for my new internal hard drive and plans to take my 1T "TimeCapsule" drive in exchange, once the data has been transferred, so he will, of course, erase that drive.
Time Capsule 802.11n (1st Gen), iOS 8.1.3