Directly - No. The new Philips External Hard Disks (SPE30 series) are pre-formatted in the Microsoft NTFS (New Technology File System) format. This NTFS file format can not be read by Windows 98 & Windows ME. Mac OS X can read NTFS but cannot write to NTFS. Indirectly - Yes.** The Philips External Hard disks can be reformatted into a different file system format. Please read the instructions for your operating system on how to format a disk.