Journaling External FireWire and USB 2.0 Hard Drives?

I have several FireWire and USB 2.0 Hard Drives which I have always formatted as "Mac OS Extended (Journaled)".
I have been told that journaling is a waste of time with external HDs and, if anything, will slow them down slightly.
What is the general consensus on this forum?

Thank you for the swift response Malcolm.
I better explain why after all these years I am having doubts.
I am awaiting the delivery of a new piece of kit - a Western Digital HD TV Media player. Basically, you put your hi-def videos (H.264) on a USB 2.0 HD, plug it into the media player which is then plugged into your HDTV.
I have got hold of the manual which says that the supported USB file systems are "FAT32, NTFS and HFS+ (no journaling).
So I was wondering whether I will have to format the HD without Journaling to make it work?

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    Last edited by ackalker (2014-03-29 19:21:04)

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