Change file allocation unit size without format
Is it possible to change a hard drive's file allocation unit size without formatting or at least not lose files?
Solution 1:
There are third party partition managers that allow you to change the cluster size without reformatting. One example is the MiniTool Partition Wizard (all non-free versions):
Be aware that all changes to a partition might corrupt the data. Backing up the important files is always a good idea.