Treat the 2 uses differently.
Seagate® Media Sync for Mac. Copy and synchronize your media files with your external drive. Seagate® Media Sync for Windows. Copy and synchronize your media files with your external drive. Current Dashboard users can effortlessly back up content as well as share and save media on social networks with legacy backup software.
A) you do not need to use any drivers for the disk. You can format the disk for Mac use with the Applications -> Utilities -> Disk Utility.
- Complete the Seagate Central Quick Start Guide. Your drive should appear in Finder under the Network section. Anyone on your home network can now save.
- Seagate has evaluated current product lines to determine which ones will be supported in macOS 10.15. Older drives that are not listed here may work, but have not been tested. Notes: This is a general compatibility article and not a troubleshooting article. If the drive is not being detected by the computer, click here to see this article.
- Seagate Backup Plus Portable External Hard Drive Manual - how to get it to work with MacBook, MacBook Air, iMac, Mac mini, Mac Pro, MacBook Pro and any Ma.
B) to backup your Mac for the upgrade, format the drive as a Mac OS Extended (Journaled) disk drive. This will NOT be readable by Windows, but you can reformat for that task after you upgrade.
Use a Mac backup utility to copy your Mac's data to the external disk. Disk Utility -> Restore can be used to copy your entire system to the external disk, just specify the external disk as the destination for the Restore.
Or you can use SuperDuper (free for a full clone, you only pay if you want the incremental and scheduling features). I think there are older versions available for 10.5
Or Carbon Copy Cloner (free 1 month fully enabled demo). I think there are older versions available for 10.5
![Settings Settings](/uploads/1/1/1/7/111709621/844369142.jpg)
C) After you have performed your upgrade and your data is safe, you can choose to blow away the contents of the external disk and reformat it as a Windows exFAT drive that can be read by both Mac and Windows. NOTE: Some Mac file attributes may not transfer, but that would only matter if you were trying to use the exFAT formatted drive as a Mac backup device. But as a file transfer device or a device for storing documents, pictures, movies (data, not programs), then exFAT is OK for that.
If you want to transfer data to Windows first, then just create the exFAT first, transfer your data, then reformat for Mac backup and upgrade.
Seagate For Mac Download
NOTE: you should be able to use file sharing between the Mac and the Windows system for transferring files.