scifiguy: Yes, this applies to WinXP also. XP's version of NTFS is slightly newer, but it pretty much works the same way. XP has a conversion utility, so you can start out with FAT32 and convert to NTFS without reformatting and losing any data. Bia: Yes, you're making sense. The 4 gig limit is on individual files. You can't have a file larger than 4 GB. Partitions are a means of dividing a single hard drive into many parts. For instance, you could divvy up a 40GB hard drive into two partitions, one being 10GB, and the other 30GB. Each partition has a separate drive letter (C:, D:, whatever). You could install your OS on one partition, and put Poser or other software on another. FAT32 has a partition limit of 32GB maximum, so you can't assign one of today's enormous 100GB drives to a single partition and drive letter, and still access all of the storage space. You have to divide it up. In theory, at least. The hard drive manufacturers usually have workarounds to let you make supersized partitions.