Tutorials/Playing and saving Minecraft on a thumb drive

This tutorial explains how to run Minecraft on a portable (Thumb, Flash, or USB) drive. This is useful if you want to keep your game data (worlds, saves data, resource packs, server list, etc.) when switching computers, as the game data will stay on the portable drive.

Prerequisites
You will need:
 * A portable (Thumb/Flash/USB) drive with at least 512MB of space. You may need more space as Minecraft saves more data to your portable drive.
 * A computer that runs Windows, OS X, or any Linux distribution that meets the Minecraft system requirements and has Java installed.

Preparation
As Minecraft requires more than the single one file to be installed, we will collect all the files needed to run and sort them onto the portable drive for easy access. Please note that if you do not do this correctly, Minecraft may crash or fail to start. All folder and file names in the Windows guide are case sensitive.


 * Insert your portable drive into your computer, and open it.
 * Create a folder, name it Minecraft Portable (or any name you choose) and enter the folder.
 * In that folder, create two new folders and name them Drive and Data
 * Note: they must have those EXACT names since we are going to use them in the following steps.
 * There are now three folders on the portable drive, Drive and Data, both within Minecraft Portable.

Launcher
Add the launcher/client to the portable drive:


 * Download the Minecraft launcher.
 * You can download it from the Minecraft Downloads page.
 * Make sure you use the "Minecraft for Windows (alternative)" version. This can be found by clicking on "Show all platforms" on the page.
 * Copy the Minecraft.exe to the Drive folder that you have created on the portable drive.

Data Files
This section will guide you on copying your game data (worlds, saves data, resource packs, server list, etc.) onto the portable drive. If you do not want to copy your game data, you may skip this section.

The .minecraft folder contains all of your current game data.


 * Press +
 * Enter %APPDATA% and click OK.
 * Locate your .minecraft folder and copy it
 * Copy the .minecraft folder and paste it into the Data folder

Setting Up
Now that all the data files are there, we need to tell Windows to point Minecraft to the files on the portable drive. To do this, we will create a batch file.


 * Open Notepad or a similar text editor.
 * Press +
 * Enter notepad and click OK.
 * Copy and paste the following into the text editor.:

set APPDATA=%CD%\Data %CD%\Minecraft.exe


 * If you would like to use minecraft.jar, copy and paste this instead:

set APPDATA=%CD%\Data java -jar %CD%\Minecraft.jar


 * Now click File > Save As ...
 * Navigate into your Minecraft Portable folder (not Data).
 * Name this file "StartMinecraft.bat"
 * Note: Make sure to include the quotation marks (""), or else Notepad will try correct it to StartMinecraft.bat.txt and it will not work.

Playing

 * Once you have completed Setting Up, you can now launch Minecraft portable by running the StartMinecraft.bat file you have created.
 * When the launcher appears, click Play to begin.

Instructions for Linux
Assume that the portable drive is at /dev/sdb1 and that Minecraft is installed at ~/games/.minecraft.
 * Note: You may need to use a different directory name depending on your distribution and set-up.

Run the following in a terminal: umount /dev/sdb1 mkdir /media/minecraft mount /dev/sdb1 /media/minecraft mkdir /media/minecraft/games # If there is a folder called games in your portable drive, skip this command cp - rn ~/games/.minecraft /media/minecraft/ # This might take a while cd umount /dev/sdb1 rm /media/minecraft # Check to make sure that your portable drive in not mounted!
 * Note: The following commands require may require superuser privileges. Make sure you are running these as root or are using sudo.
 * Note: Text following the # symbol are comments, and can be omitted for that line.

After that, to launch Minecraft, enter the following in the terminal with superuser privileges. umount /dev/sdb1 mkdir ~/games # If there is a folder called games in your home directory, skip this command mount /dev/sdb1 ~/games # You will not be able to play any games that are saved in the ~/games directory

Run the Minecraft launcher to start playing.

Setting Up

 * Locate your Minecraft files. Press Command+Shift+G while in finder and then paste ~/Library/application support/minecraft into the dialog.
 * Copy that minecraft folder in your application support folder.
 * Insert in your portable drive and make 2 folders in it:
 * data and drive
 * Paste your minecraft folder into the "data" folder in the portable drive.
 * Drag your launcher into the "drive" folder
 * Remove your portable drive

Playing
Once you are done setting up, you can test if your Minecraft can start on another Mac.
 * Insert your portable drive into another Mac to test
 * Open the launcher folder and move the Minecraft launcher into your Applications folder.
 * Double click the launcher to run it. Then after Minecraft loads, exit it.
 * Again, go to Users/USERNAME/Library/Application Support
 * In "Application Support", delete the minecraft folder.
 * Move the minecraft folder in your data folder on your portable drive to the desktop.
 * Then drag it from your desktop into application support.
 * Run Minecraft again.

Additional Notes

 * To install resource packs or mods onto the portable drive, use the .minecraft folder of that portable drive.

Source
If you have any trouble understanding, the original guide can be found in this thread.

Cryshal's Method
Doesn't work, minecraft still runs from the appdata folder, Minecraft Profile Manager is useless, and java will not run from the flash drive. ''

What you need:
 * A flash drive. (I'd suggest around 2GB, but varies depending on how many worlds/texture packs you have)
 * Windows


 * First, create a folder named, say, "Flash MC". Then, go on over to get jPortable which lets you run Java right on your flash drive, without it being installed on the computer.


 * You will want to install that onto your flash drive in a directory like \Flash MC\jPortable.


 * Then, go to Minecraft Profile Manager's thread, and download it.
 * Put it into your Portable MC folder. Follow the instructions. (Put minecraft.exe into the same folder that it is in)
 * You should now be able to launch MPM, make a profile and download all the needed Minecraft files to play.

Note
I hope this helps you!
 * MPM runs using JAVA, meaning you must have java running in order for it to work.
 * Computers that are running windows should work just fine, unless they haven't been using Microsoft update.

HiWiki's Method
WARNING - Do it in your own risk! Only Works in WINDOWS!


 * In this method you will need:
 * USB (Minimum Space is 2.5GB or more if you have mods and/or texturepacks (You will also need Additional space for worlds))
 * Notepad
 * Minecraft Client
 * And .minecraft folder
 * And .minecraft folder

Steps
SET APPDATA=%CD%\data bin\minecraft.exe
 * First things first! You need to make two folders named bin and data
 * Then you place minecraft client inside bin folder
 * If you use a jar (or anything else that run minecraft) will still be placed in the bin folder
 * But the data of minecraft isn't in the data folder yet,
 * So you will need to Press +  to open run and type in the dialog box %appdata% then copy .minecraft folder (Also include other folders that also included in minecraft such as .aether)
 * Select those folders then press +  (or  +  if you want to move the files rather than copy it)
 * Then after that Press +  to open run again and type notepad then paste the following code in it:


 * But if you use a Jar, put this instead:

SET APPDATA=%CD%\data bin\minecraft.jar


 * And if you use a Jar/Exe with a different name such as Minecraft-launcher put this

SET APPDATA=%CD%\data bin\ .


 * Then you are all done!

Note!

 * You will need Java for this, but if you also want java in your Flash/Thumb/USB drive then scroll down and look for Add Portable Java
 * Any data you have in your .minecraft in appdata will also be in your Flash/Thumb/USB drive

Add Portable Java Method
You will need an extra 0.5 GB in your Drive for this to work!


 * Now you have done the above
 * Time to add portable java! (YAY!)
 * 1st, Click this link
 * Then on the page that redirected you, click Download Now or this link
 * Then open PortableApps.com_Platform_Setup_11.2.exe then wait until you see the add apps section
 * Make sure you place the setup in the Flash/Thumb/USB drive!
 * Then in utilities find and tick the boxes jPortable,jPortable Launcher,jPortable Browser switch then press install
 * Then wait for it to install then after that, your done!

How to open jPortable

 * First, find the folder PortableApps in your Flash/Thumb/USB drive
 * Then double click start, Then press jPortable Launcher
 * A window will open, then find the jar (Don't worry if it shows jar can be opened only change it to all files then find your exe)
 * Then after that press open then your minecraft will open

Issues and how to fix them

 * The minecraft directory is not there, if that happens then press edit profile then find and locate your data folder in file explorer then right click it then press properties
 * Also in the edit profile window tick the Game directory box
 * Now a window should open, so you will Select the text by dragging in the Location Line then paste it in the Game directory box then include this \.minecraft or paste it in the Game directory box
 * Then you are done!

Credits
This part was made by HiWiki! If there is information that is not here, then I did not made it, then also PM so I can restore it If there's any problem PM me and i'll help you (But not all the time) The original source can be found in this thread.

I hope this part helps you!

Changing the launcher file to use an autorun.inf
If you are using an autorun.inf instead of using

set APPDATA=%CD%\data bin\minecraft.exe

or

set APPDATA=%CD%\data bin\minecraft.jar

change the file to this:

set APPDATA=Minecraft portable\data cd Minecraft portable\drive\ Minecraft.jar

Video Tutorial
A video tutorial showing the step-by-step procedure on how to make Minecraft portable and run it from a USB thumb drive without Java installed