Hi all!
I wonder how to install the application to card on N810
Everytime I install app from app manager-installable app menu, the app directly install to main mem, it not prompted any choice to install on card or what folder,

Anyone can give guidance how to make app installed on card? for installed apps is it possible to move them to card?

many thanks!

Short answer: You can't.

Long answer: There are three options:

• Since a card with a FAT (Windows-compatible) filesystem can't store UNIX permissions, you can move large data files to the card, and symlink them in; but the apps themselves stay in memory.
• You can put an ext2/ext3 filesystem on the card, which will render it non-readable in Windows, but allows you to move entire directory trees, like /usr/, onto it.
• The best option for most people is to repartition the card with a FAT partition for file access, and a ext2/3 partition after that; you can then clone the entire internal memory into the (larger) ext2 partition, and boot from the SD instead of main memory.

While cloning and dual-booting is the best of these three for most people, it's not without it's difficulties. The best thing to do if you're uncomfortable with that procedure is to clear out the demo video and user manual PDFs (at least the ones not in your language!) that come on the device, and maybe keep your own data on the card instead of in main memory; you can usually clear up enough space for the apps you need that way, unless you're doing seriously advanced stuff.

OMG! Thanks Benson!

I think I better leave the app on Main ram due my lack of knowledge. Too complex for me

https://wiki.maemo.org/Booting_from_a_flash_card

You could also create an ext2 filesystem on top of FAT, to avoid repartitioning.. that's what I do, but I'm too lazy to give instructions at the moment

Nokia really should have provided an easy way to install applications on the SD cards, that internal memory fills up very quickly!

This has been covered before. There really isn't an easy and robust solution available.

Hope next firmware (v4.2 maybe) solved install app on card.

There's not going to be a 4.2, and it definitely wont.