The DCS-942L is not size-limited but rather is time-limited to 6 minutes per file.
Access the recordings by pointing the browser to http://camera's ip address/ and then choosing Setup, followed by SD Management.
Hint: Change "Files per Page: 5" to 100 so you can see everything on one screen instead of flipping through pages and pages.
The file names are date-coded, so you need to know the time you're interested in. There isn't a fancy timeline view or other GUI like you get with products like DropCam.