How large are the PST files? Unless they're over 4 GB they should be able to be transferred via a USB flash drive formatted to FAT-32. I've never heard of a PST file being that large so it's possible that I don't understand what you're trying to do?
Thank you for the confirmation. Yes BIG PST files are possible with Outlook & Exchange 2007: as big as 6 GB, can probably be more, my biggest is about 6.5 GB. This created my initial problem, which I could not solve: .pst files above about that size would refuse to be copied on a 16 GB USB flash drive despite their having plenty of space available. Suspecting that FAT32 formatting of the USB drive was the cause and not willing to do NTFS (Windows) formatting from the mac, I issued the question to the forum. Now that I went through it and am done, FWIW, here is how it went.
Attempt A: Sharing the office PC folders & files for access by the mac. Failed
Officially, this is simple. Slowly through the wireless router or fast through two ethernet cables both connected to the wireless router (a time capsule), the mac "sees" the PC. No more. The office PC is secure like an oyster: no way to enter. unless you are advised by the secretive corporate admin. Attempt failed.
Attempt B: Sharing the mac folders for access and copying into from the PC. Success
This is the complex and anti-intuitive route: using the PC's finder to work our file copying, Complicated and unforgiving, but it works.
This is described somewhere in this forum. It goes somewhat like this:
On the mac, launch system preferences and click on "Sharing"
Enable file sharing, select what it takes for file sharing to Windows: click "SMB (Windows). Before closing this windows, take note there of your mac IP address [provided by your router] (may be something like "afp//192.166.1.9/")
Click "accounts" to verify your login name on the mac (may be something like "MacBookPro-de-Jean-Pierre-Smith"), remember your password (the one you use to enter your account on the mac)
From the Windows PC (wifi or wire connected to the mac), Go to start menu and click "run"
Enter the mac IP address, like "\\192.166.1.9\" and click "OK"
Bingo ! you are in the mac but not in your account yet. Your are asked a funny question about login and password, which makes you believe you are still on the Windows world. Wrong belief : you are in mac territory with the look and feel of Window territory. Enter your mac account login and password and click "OK"
In your windows window, you are now in the mac, navigating in your private folders, ready for copying those .PST files directly
Same as before. PST files bigger than a certain size (4GB) cannot copy (unknown cause, someone on this forum may explain the cause). So zip them of 7z them on the PC. Copy the compressed files (which are not so big once compressed), or cut the regional PST files into smaller PST files. Unzip those big files on the mac with The Unarchiver (Apple Store). The smaller psd files copy all right
You can then access those pst files on the mac with PST Bridge (Apple Store)
Bingo !
I give my warmest thanks to this forum.
HTH