Having a bit more luck with settlements now. Have gone to quite a few. Searching for security firmware patches. Someone else posted about these being in medium security settlements. And I've found that to be true. As well as other security types such as low security and the level of them (ie '+++') yielding the specific types of data according to those levels.
I've also been having fun trying to infiltrate them with greater efficiency. Some are certainly easier than others. I have not tried to attack and clear any base yet with my ship, as someone had stated that the turrets respawn fairly quickly. As well as some having security ships docked or orbiting the ststion( which the ships orbiting will soon jump out shortly after you arrive, but not already docked ships). So I've decided it was best to try and infiltrate stealth like with the srv at all times and have become quite good at it after some practice and srv skill honing.
Couple tips:
Use the camera!! In the srv, you seem to have a LOT more range with the canera, And can use it to your advantage to scan the surrounding area or over walls. I try to scope the area out as best as I can either in the center of a smallish base, or at a couple areas in the larger ones. Or get to a rooftop for an even better hawks eye view. Locate as many of the data points as you can and remember their location, while planning your run. Maybe even do a test run.
If any areas bring up the red no trespass zone (the red squared in areas that show up on radar) you will be attacked once the very short timer runs out whilst in that area. Try to save these data points for last. Or try to scan them through a wall as suggested earlier by another member(have not tested this) Or fight your way out. If you last long enough it will still save the data (as long as this was your last data point access and completed the cycle).
Also to do with the same trespass areas, if a data point is NOT on the ground but atop a building, you can (most times) access the rooftops and not be trespassing as long as you can get up there. Which leads to the second tip...
Any red barrier 'walls' or "force fields" (ones that are on ramps and require disabling to pass through) can be circumnavigated with a bit of skill in the srv, without having to worry about attacking the settlement and still be in 'stealth' mode. The trick with this is to Use your boosters to fly off and around the side of them. Use the camera first to make sure there isn't a ledge where you'll be landing. Then accelerate a small amount (just enough to let you float with minimal speed in the air and not overshoot), keep boosting until you reach your landing spot around the barrier, and land safely as you can. Even if you have to tumble your way in. Heh. Will only cost you a couple points of hull at most. Unless you go too fast and overshoot. Then you can access the entire rooftops with no trespassing!!
Along with exploring the rooftops, I also discovered that some data points are on rooftops that seem inaccessible. However some have little connecting bridges that can be driven on to reach it!
Another fun fact, is any wall that has a very steep grade to it, can still be driven up!! If you just drive up to it you will smack against it. So again with careful skill, very slowly gain a little bit of momentum, boost up just enough to tilt your srv backeards, and plant you wheels on that wall. Then full throttle and you climb that wall!! Also works going back down too.
Been finding these extremely fun. And although I've only received 3 security firmware patches (that I was on the hunt for for a measily level 2 mod and seemed to be the scarcest resource needed and now only have 3 attempts whereas I've got enough other materials for many more attempts minus the patches), I've gained many others which I'm sure I'll need at some point for other mods. As well as becoming a master at stealth infiltrations.
Hope this helps. I know I revived an old thread. But didn't see much out there regarding this.