Question :
I bought an 8GB SD Card the other day, but, it didnt work on my galaxy mini. The guy at the shop said that Samsung Galaxy Mini GT-S5570 can not handle it. So, I am stuck on my 2gb SD Card.
I just wanted to ask you if partitioning this 2GB SD Card, will I be able to make the partition to 500MB ?
The original 180MB for apps is way too low, and I think I could do with 500MB somehow.
Reply :

The guy at the shop probably didn't know much about it. In fact, Galaxy Mini can support sdcard upto 32 GB, however I don't recommend using it, since your device will load slow as it'll take much time to scan the card and load files. 8 GB or 16 GB memory card should be enough for galaxy mini users. Now, for you case, if you are really not satisfied then, I suggest you pay a visit to some other shops and seek for a 4, 8 or 16 GB card. Don't forget to try it out on the spot. It should work fine.
Note : Some cards need to be formatted before you can see or use them.

Also, yes, you can partition your 2 GB card to create a sd-ext partition of 500 MB which should be enough if you are a normal users. Simply follow the step by step instructions given at this article to partition your sd-card. In case you buy a new card, don't allocate more than 2 GB for your sd-ext partition. 500 MB or 1 GB should be enough for normal users.

Also, it is to be noted that, even if you use sd-ext partition (to preserve your internal memory), it doesn't necessarily mean all apps should be installed in sd-ext/app/ directory. Some apps, which support Androids' app2sd (a new feature introduced by Google with Android 2.2.1 Froyo release, which let's developer to install some or all part of application and data to be stored in sd-card.)  feature will be installed in sd-card as usual. This means, most games will be installed in sd-card which justifies the reason why you shouldn't allot more than 1 GB of memory for your second partition in sd-card.

Good luck and happy partitioning.

Question :
What is root directory? I am instructed to copy a file to root directory at this article (http://yagyagaire.blogspot.com/2011/12/rooting-samsung-galaxy-pop-with.html) but I can't seem to find it. Can you explain it in detail and tell me where can I find it?

Reply :
The root directory is the first or top-most directory in a hierarchy. It can be likened to the root of a tree — the starting point where all branches (other folders or sub-directories) originate. For example : The C:\ drive in your PC is root directory and folders inside it are called child or sub-directories. Similarly, D:\ , E:\ or any other drive are root directories.

In the case of sdcard it's a removable disk that is mounted in your PC. The first window you see by opening it is called root folder and in the article above, you are simply instructed to copy it to this folder and not inside any other folders within the /sdcard/ directory. You can even view this by using root explorer and navigating to root (usually denoted by /) directory.

For your information, you can simply ignore it and just copy and paste it inside sd-card you mounted in your PC.The above article asks you to do so because it is easier to find the file in recovery if you don't paste it inside other folders. Also, some recoveries might not let you navigate inside folders in recovery mode so, it is useful in such situation too.

Hope that was clear. If you still have doubts then this Wikipedia article on root directory should help you learn more.

Question :

Does deleting folders like ".android_secure" on SD card cause interruption while turning on the phone? or Can I delete all the folders on it.

Answer :

No, probably it won't interrupt the booting process --meaning your device will boot fine even if you delete all the folders in sd-card or format your sdcard. However, some of your apps will not work since '.android_secure', Android, data and few other folders (especially those whose name starts with a period(.) sign are created by system (Android OS) and thus are important folders. '.android_secure' folder holds apps that have inbuilt a2sd support and they are installed in sd-card by default even if you don't have any custom a2sd script. Similarly, other folders mentioned holds data/cache along with some parts of applications. So, removing them means making some of the apps disappear from your App Drawer or from functioning them properly. This may require you to re-install all those apps to make them working again.

So, in conclusion it is better not to delete all the folders in your sdcard. But, in case you need to make sure you keep the ones mentioned above and other system folders and remove remaining ones. That would prevent you from having any type of trouble with your device.