How (where) do I browse to the /data/Tombstones (on the System Partition, I think)? Trying to delete some files from my System partition.
Someone suggested deleting /data/Tombstones
(I.e., what's the Path to it so I can browse to it)

Using Astro File manager I navigated from the SDcard0 up until I got to what seems to be the root. It has folders like:


acct
cache
config
data (which is empty)
...
firmware
...
tombstones (which is empty)
system  (is this the system partition), it does not contain a Tombstones folder.
If /data appears empty, the app showing that most likely has no root access ("root" in the sense of the privileged user, not the start of the file system). In order to browse that place, root is required.

Not all file explorers support this. For one, there are several specific "root explorers" around. I'd rather recommend ES File Explorer, which I use for years: it offers a lot of features you will welcome after solving your issue – and yes, "root access" is one of them. Provided your device is rooted.

And yes: what you're looking for is /data/tombstones, where "core dumps" of crashes are stored.