Difference 'SD-install' and 'internal storage install'

[Elrohir]

Because i cannot find a clear answer on my mindbreaker i do open this thread. Can someone please inform me about the characteristics of an install on internal storage (i recon flashmemory) and on an install on the SDcard?
What's to prefer? I would think its mostly a speedissue (in advantage of the SD), but maybe there are other circumstances to deal with in this issue (besides the physical storageamount of course)?

[dysolve]

i have had a lot of problems with the sd-card. everytime I remove the card I loose some programs, programs seem to take up more space when installed on external memory, but I have not seen a speed difference. I have got one question to add to this. whats the read/write limit on the internal memory?

[gerald_s]

Sometimes people are loosing files on SD card or the card is not readable anymore. It never happened to me, but there's a thread about this topic somewhere here. And of course you should never remove the card while the device is turned on. This can cause the loss of data, maybe thats the reason why dysolve was loosing some programs?

But the most important thing is:

NEVER install a program on card which is running after a reset or after waking up the device. Windows needs some time to find and initialize the card, if a program is autostarted and the card is not ready Windows may freeze. The same is for ringtones. If the device is in sleep mode and a call comes in and the ringtone is on card then Windows will not find the ringtone that fast. In this case it will not freeze but its possible that its not ringing.

I installed a lot of applications (i.e. Mobipocket, all ebooks and so on) on card, but all autostarted apps I installed on internal memory. The same is for the alarm clock, its running while the device is in sleep mode. If the alarm clock program would be on card the device would either crash or the alarm would not go off. Both would bring me in a bad situation because then I would come to late to work and the boss is not allowed to come late :D