Acomdata External HARD DRIVE USB 2.0 User Manual page 15

1. If you don't need Windows compatibility, you can re-format the Drive using one of
the Mac OS Extended file systems. See "Re-Formatting the Drive" for instructions;
2. If you want to maintain Windows compatibility, you can partition the Drive such
that no partition is larger than 128 GB. Partitioning a hard disk will erase any data
stored on the disk. Go to http://docs.info.apple.com/article.html?artnum=107483
for instructions;
3. Before you connect the Drive, upgrade to Mac OS 10.3 or later. This option will
allow you to maintain Windows compatibility and no partitioning or re-format-
ting is required.
For more information about this issue, go to:
http://docs.info.apple.com/article.html?artnum=107483 on
the Apple web site.
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