hi someone refer to me this forum,
i just wanna extra space in my inventory so can any soul kindly guide me step by step?
There is no client-side mod to increase the size of your inventory. There used to be some things to sort of get around that but they were not simple, are patched, are bannable offenses, and we don't talk about them here for those reasons.
People deal with space issues in-game by...
1 - Getting bags.
http://wiki.mabinogiworld.com/view/BagsAn Item Bag (from NPC shops) is the standard everybody should get and is available to everybody at all times, but you can only have one of that type.
Things like Doll Bags and the higher-capacity Item Bags are limited-time and/or cash shop items... some of these can be traded so you might be able to buy them off another player if you save up a lot of gold.
There's also specific item bags (last section on that page) that you can get in-game that hold a specific resource, like firewood, score scrolls, ores, etc.
2 - Making use of the Bank tabs. Make extra characters, each character gets a bank tab, so you can use this for long-term storage. Note that it's recommended you do your banking in one specific location (such as the Dunbarton Bank) because you can't take the items out at another bank than you put them in unless you pay a small gold fee and wait for them to transfer (or pay a bigger fee to skip the transfer).
3 - Using the Dressing Room to store clothing and equipment. One of the buttons at the bottom of the screen (assuming that bar isn't minimized) has a Dressing Room option. This is like a portable bank for clothing, armor, and most things that go into your non-hand and non-accessory equipment slots. It can only hold one of a specific item, but it can hold most things in the game so it's great for storing spare clothing, armor, shoes, stuff like that. It charges you some gold to withdraw the item (which is why I compare it to the bank) but it's free to deposit, so again it's useful for long-term storage (especially as clothing and armor is so darn big).
4 - Pets. Everything that's not the starter pet has an inventory, you can right-click the pet and "manage inventory" to access it, or type "Bag!" into the in-game chat when the pet is out. pet inventories are one of the main ways people expand over time, most pets have inventories smaller than the player, but they add up (and some have it the same size or bigger). Nexon is actually selling a bunch of pets cheaply right now if you don't mind spending NX...
http://mabinogi.nexon.net/News/Announcements/1/00IIrThe Border Collie in particular has a special ability where it will run around and try to pick up items into its own inventory for you, but other than that...
Economy Pet= White Jindo - 36 inv - 1550 nx total
Cheap but best inv room= Labrador Retriever - 54 inv - 3200 nx total
However if you don't want to spend NX on pets for now, you can complete The Saga 1.
http://wiki.mabinogiworld.com/view/SagaIt's a long questline and requires a lot of tough combat for newbies, but it's very rewarding in terms of AP and gold given to you, and once you beat all 10 episodes you get a free Perseus pet.
http://wiki.mabinogiworld.com/view/Perseus