With the troubles experienced resizing partitions, have moved to employ a cleaner approach.
- Make an image of the contents of each drive on the HDD and save them on a second HDD.
- Record which image was associated with which partition. ie; OS Drv = C:, Data = D: and so on as they will be needed when you re-image the drives.
- Flatten the drive by deleting each partitions and returning it to its original condition.
- Recreate the drives and associated partitions in the sizes desired. DO NOT select the Quick Format option.
- Re-Image the newly created drives from the stored images in step #1.
The mindset focused on when using this technique is one where files and folders are secondary. The entire digital content of the drive is considered as a single unified entity.
To be able to accomplish this you will need experience in creating and restoring drives images using third party system backup software such as Ghost, TruImage, etc. You will also need patience as you will go through several long periods of waiting for processes to complete. One such process is the verification pas made after the image is created. During this pass any problems with image are detected. The process should be viewed as an essential component.