What kind of FileSystem do you recommend for USB Flash Drive?

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http://askubuntu.com – I'm new to Linux. This is a problem I'm having when using Ubuntu: I have two computers that have Ubuntu installed on them (comp1 and comp2). I create a document with Ubuntu on comp1 and then copy the file onto a FAT formatted USB flash drive. Via the flash drive I paste the document onto comp2. The problem is that the file-permissions are never preserved during the transfer. I'm assuming because the FAT is not supporting the permissions. Is there a solution to this? Should I continue to use FAT file system for USB flash drives (because FAT is best for flash drives) and just live with this p (HowTos)