I don't know why the peculiar names for the folders, but I do know what they are--there are different folders for every user (including some system "users") on your machine. Inside are stored various caches and temporary files. For instance, when you go to YouTube and watch something, the flv file actually streams into the temp folder called "TemporaryItems" (which will disappear, both the temp file and the folder itself upon a restart). You have some program which is constantly writing to the TemporaryItems folder.
There are a couple of things to try to find out what it is that is writing the files. One is to launch Activity Monitor, make sure "All Processes" is selected at the top, then click the CPU column head and watch to see what processes are popping to the top. Thus, when I play something at YouTube, the temp file gets written to the TemporaryItems folder, and simultaneously Safari pops up to the top of the Activity Monitor.
You can also try Terminal, use the "lsof" command. You lsof, then a space, then drag the temp file into the Terminal and drop it, and hit the return key. Here's what I get:
lsof /private/var/folders/90/90gu9daQFSitP4FD2179ck
+TI/TemporaryItems/FlashTmp0
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Safari 165 francine 24u REG 14,9 5658149 14718012 /private/var/folders/90/90gu9daQFSitP4FD2179ck
+TI/TemporaryItems/FlashTmp0
The part you are interested in is the part under "COMMAND" and perhaps the part under "PID"--the first in this case is Safari, the second is the number "165"--you can then go to Activity Monitor and look for the process listed by name or by process ID. That should help you figure out what is causing the problem.
Francine
Francine
Schwieder