User account on external hard disc frequently gets corrupted - reasons?

Dear all,
I have recently written a question regarding a problem with my user account; in this question I have described that I have my data for my user account on an external hard disc (USB2 hard disc), and that all data in this account seemed to be deleted one day (in fact, it was simply set to a wrong path, see below); user V.K. has helped me out of the problem - the problem could be solved by renaming the external hard disc and setting the path to my user data folder in the "user account" settings to my old folder on the renamed disc; You can find our discussions here: http://discussions.apple.com/thread.jspa?threadID=1513799&tstart=0 By the way, I use OS X 10.5 (newest version).
Now, several months later I find myself in the situation that the problem returns frequently, although I do not yet see regularities or the reason; each time the described renaming-procedure helps, but anyway it is annoying, and some programs who have data on my user account folder (such as Linotype FontExplorer X - latest version!) even fail to notice the change and have to be very reset with lot of effort.
Now, as I can not imagine that I am the only one who uses a user account on an external drive, I start wondering what am I doing wrong. Did anybody else ever experience problems like these? Does it also occur when the user account is stored in a network (on a server) - which must be a very common workplace setup? Is there anything known about the reasons?
I do not understand what causes this problem; and also, the problem seems to be very intricate - I do not know enough about the internals of Mac OS X, but (if You look into my old post cited above), if You simply try to reset the user path in the user account settings to the folder on the NOT renamed disc, the account stops to work completely, and the user cannot log into it at all; somehow, there seem to be different "stages" of corruption of the account on the external drive - I think that this may help somebody with detailled knowledge to understand the problem, but I am out of the game here... also, all the old names of the external drive keep to be mounted in the "Volumes"-folder on Macintosh HD - although they don't exist anymore.
I have formatted the external drive to "Mac OS Extended"; is this okay - or should it better be formatted to "Journaled"? The drive is a 500 GB external drive from LaCie - I think it should be okay (I have two of them - one for TimeMachine - the drives themselves work reliably, it appears).
Is there anybody who can help - or anybody with a similar setup and who could tell me whether or not he ever experienced a similar problem, and what he did against it (if necessary)? Thanks in advance!!!
With kind regards and greetings from Berlin,
Björn

Aside from starting over, losing whatever you've done on the new machine, see Pondini's Transferring files from one User Account to another. If you haven't done much and can afford to lose that data, I suggest starting over, following the steps in Pondini's Setup New Mac guide. That should result in just one user account.

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Message was edited by: a brody

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Emma1609 wrote:
Hi,
hi emma, and welcome to discussions
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