Hello skew, welcome to LQ,
in general it is no problem to access any Windows-partition from Linux. But Windows itself is not able to access Linux-partitions.
There are manuals in the internet, read for example here: https://help.ubuntu.com/community/Mo...dowsPartitions
The limitations are that one operatingsystem doesn't know about the users of the other and so the filepermissions will not work. This means when accessing Windowspartitions from Linux, everything is shown as executeable (without any permissions). It is possible (and I would recommend it for security) to mount a Windows-partition from Linux in a way that only root has write-access to the windows partition.
Another approach is to create a "shared" datapartition for both, Windows and Linux with the FAT32-filesystem (which can both access), but here also are no permissions. Every user can delete everything on a FAT32-partition, it is not useful for important data.