There are a couple of issues to consider in using an external drive between a PC and Mac. One, in order to do so, you must reformat the drive in a FAT 32 file format - which you can do using the Mac under MS DOS partition scheme. And it should format the entire drive. However, you will have a 4 GB file size limitation with FAT 32.
The second issue to consider, is that eventually you will corrupt the drive partition and/or files passing them between Mac’s and PC’s. So, in order to pass the files back and forth between the two types of OS’s, you should always have a back up of those files for when they get corrupted. Now, that corruption potential should diminish if you’re only going to be using those files on PC’s afterwards. Nevertheless, always keep a backup of your data.
