Partition way to big

Take a look this thread
Partition or Volume - Shrink

You can Resize the Data partition from the left using free Partition Wizard bootable CD if you need.

Disk Management should offer to make the new partition Logical Extended which is a good idea since you can only have four Primary Partitions, so if you ever need to add a fifth partition you'd have to convert a primary to Logical.

A logical partition can add as many subpartitions as you want until letters run out.

Hello pare.



If you use Windows disk management to shrink the C: partition the D: data will not be bothered and will be left intact, here's the second half of the tutorial Stalker posted; though Windows will probably not allow the C: to be shrunk to 100GB.

How to Create a New Partition or Volume in Windows 7



If you want to explore the use of the free Partition Wizard boot disk, have a look at this tutorial at the link below for links to the program download and ideas on its use amd be sure to post back with any further questions you may have and to keep us informed.

Partition Wizard : Use the Bootable CD

mjf said:

gregrocker said:

so if you ever need to add a fifth partition you'd have to convert the a primary to Logical.

Are there any advantages in staying primary with your 4th partition if you don't plan for any more?
and
Are there any downsides in converting from primary to logical if you do need more later on?

Hello mate, have a look through this one.

The 4 primary partition problem

pare said:

Hi StalkeR and thanks for your reply.
Any idea what will happen to the data partition next to the C-partition?
Will it just grow bigger or become unallocated?

The Data partition will remain untouched.
Using Windows Disk Management you should end up with unallocated space when you shrink the C partition.
You can then make a logical partition from the unallocated space.

Disk Management may not let you shrink it as much as you would like, Partition Wizard will shrink it to any size you want.

You have excellent info and links from the other members above.
Any reason you don't want to use third party applications?

There are some very good free apps,like Partition Wizard linked above, that can do this easily, they are safe and tested by many of the members on this forum.
They are highly recommended.

Before doing any partition manipulations it's a good idea to make a image backup, just in case something goes wrong.

Another free application Macruim Reflect can make image backups and is very reliable.

Here is a tutorial explaining how to use it: Imaging with free Macrium

It's recommended to keep your backups on a seperate physical hard drive, if your hard drives fails you will lose your backup with it.

If you don't have another hard drive then keeping a backup on your main HDD is better than not having a backup.

Good to see we were a help and be sure to post back to keep us informed.