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PC external hard drive to Mac

E

Elementkng20

macrumors member
Original poster
May 28, 2009
49
0
I don't know if this was covered or not, but I couldn't find anything on it. I have an external hard drive that is formatted to my PC. I want to use it for my Mac but I can't edit, delete, copy files because it's formatted to my PC. Now, is there a way to format it to Mac without taking everything off and putting it back on?
 
If it is NTFS the Mac should read it, but not be able to write to it
If you truly want cross platform compatibility you will need FAT32

You may be able to use a 3rd party app to read/write, but your best bet is a reformat

MR Guide: File Systems

File Systems

HFS+
This is the principal file system of Mac OS X. It is a journalled, relatively modern file system that supports POSIX permissions, and features at least limited automatic defragmenting of files. Mac OS X is capable of mounting these volumes for reading and writing, and has full capabilities to utilize them. Mac OS X systems can also only boot from hard disks formatted in this system (as well as bootable optical media). Windows has no native support for this format, but third party tools such as MacDrive allow for limited read/write support on Windows systems.

NTFS
This is the current preferred file system of Windows (beginning predominance circa Windows NT 4.0 and Windows 2000, and including Windows XP). Most Windows systems use principle partitions with this file system. This is a journalled file system with good support for large files. It should be noted that it does NOT support POSIX permissions or ownership. Mac OS X has read only support for this format. It has no capabilities to write to an NTFS drive. Windows has complete read/write capabilities for this format.

FAT32
FAT32 is a legacy file system in the Windows world. However, it is still widely used as almost all Flash-based drives use this format. Mac OS X supports this format for both reading and writing, as does Windows. It has notable limitations, including difficulties with files of size larger than 4 GB. Also, as with NTFS, this file system does not support POSIX and permission / ownership errors could arise when files are moved back and forth between this file system and a POSIX-compliant file system.

ext2
Ext2 is a relatively modern filesystem that is used primarily in Linux environments. It features many of the same creature comforts as OS X, including a journal and the ability to use large files (e.g. bigger than the 4 GB limit in FAT32). This file system is not natively supported in either OS X or Windows, but free extensions are available for both operating systems that allow basically full read/write utilization of this filesystem on both OS X and Windows. The Mac OS implementation is available at Sourceforge; the Windows implementation is available here.

Comparison
Another important distinction that should be noted is that all of the above is based on disks mounted under the given operating system. Limitations can be bypassed by serving a disk from a server for which the format is native. For instance, a Windows client that is accessing a served HFS+ disk that is served from a Mac OS X computer (a "shared" disk across the network) can write to that disk if the server has granted permission. Likewise, while a Mac OS computer cannot write to an NTFS volume it mounts itself, it can write to an NTFS volume being served by a Windows computer.

One important question that gets asked frequently at MacRumors is: how should I format my external device? Here are some suggestions, based on the above limitations of each filesystem.

1. If the device will only be used on a Mac OS X computer, use HFS+. This will offer the most complete support for Mac OS X features.

2. If the device will only be used in Windows, use NTFS, for the same rationale.

3. If the device will be mounted on both Windows and Mac computers, and you will not be using very large files (all files <4 GB) use FAT32. Alternatively, if possible, mount the device on a computer on the network which is always turned on, and format it in the native format of that computer. Then use that computer as a server to share that volume with other computers. For this purpose, it may be slightly advantageous to make the server a Mac OS X computer, so that the file system complies with POSIX.

4. If the device is to be mounted on both Windows and OS X computers, and the user has sufficient privileges on all computers with which it will be used to install the EXT2FS extensions discussed above, then finally, EXT2FS may be an excellent solution. Note however that, should this drive be taken to other Windows or OS X computers, it will not work without installation of the extensions.

5. If you are using an Intel Mac, one configuration that is very popular is to create a three partition system. This system consists of boot partitions in HFS+ and NTFS for Mac OS X and Windows, respectively, plus a third partition in FAT32. All documents are then placed on the FAT32 partition, where they are accessible to both operating systems. While this does have limitations, based on the limitations of FAT32, it may be a good compromise solution for many users.

6. Current iPods come formatted by default in a format which can be read by both systems (FAT32) and should probably be left this way unless specific needs exist with respect to alternate usage (e.g. as a drive for sharing files). While earlier iPods were formatted in HFS+ and this system confers some advantages in Mac-only environments, this is probably not something you should worry about unless you already know what you are doing. Likewise, Flash drives should NOT be reformatted and should be left in FAT32.

File systems cannot easily be converted from one standard to another, so make your decision carefully. In the event that you must later change systems, you will need to back up all files, reformat the drive (destroying all data on it), and then return the files to the drive. Drives can be formatted with Disk Utility in Mac OS X, and similar system tools in Windows, though Windows cannot format a FAT32 partition above 32GB, as Microsoft want you to use NTFS; this is an artificial restriction. iPods can be reformatted using the iPod Software Updater, available from Apple. Backup utilities are also readily available on both platforms (backup to multiple DVD-R or DVD-RW discs may be necessary if only one external drive is owned).

When Mac OS X writes to a FAT32 drive, it will create additional "dot files" (files beginning with "." are normally hidden in Unix systems) such as .DS_Store. These files allow Mac OS X to compensate somewhat for features of HFS+ that are not available in FAT32. The end result is that most files, including almost all document files, can be transferred back and forth between FAT32 and HFS+ without any real concern over he file system differences.
Click to expand...

Woof, Woof - Dawg
pawprint.gif
 
Download and install MacFUSE. This will allow you to read and write to the drive.
 
I am having the same problem with my new 27" iMac. This is my first mac and I can't write to my external hard drive.
I have seen the Fuse that let's me do this, but my question is, do I need to empty the external hard drive first or is it something that I can just download and start using?
 
Does anyone even use FAT32 any more???

danmc00 said:
but my question is, do I need to empty the external hard drive first or is it something that I can just download and start using?
Click to expand...

Good question, I can't help but would love to know the answer.
 
I thought* you could drag and drop files from OSX into a Parallels session running Windows (NTFS) ?

Surely this concept applies to external hard drives, no?

* or am I misinformed?
 
I downloaded MacFUSE and tried to drag and drop a file from my desktop to my external hard drive and it still wouldn't let me. What am I doing wrong?
 
cman-uk said:
I thought* you could drag and drop files from OSX into a Parallels session running Windows (NTFS) ?

Surely this concept applies to external hard drives, no?

* or am I misinformed?
Click to expand...

This is how I get around it. I have an NTFS drive and Windows 7 running in Parallels. When I connect the drive, Parallels asks what system I want to access it from. I say my Virtual machine and poof... I can drag and drop file to it without a problem.

FAT32 is still around because of its cross platform functionality. For example, I rip DVDs to a FAT32 external for viewing on my PS3. Plus I can then share it with anyone regardless of what kind of system they have.
 
I have tried it again today with no luck. MacFUSE 2.0 is open and running and I can't drag and drop any files to my external. Any other ideas?
 
So you are saying if I install MacDrive on my Mac, then I will be able to write to the external hard drive? I do not have a PC anymore, so it totally reformatting the hard drive is easiest, then I can do that.
 
You need Macfuse AND ntfs-3g, then it will work. I have a g5 and both installed, works great : 1TB Seagate Freeagent Desk, Partition 1 Mac OS Journaled 160GB (Time Machine), Partition 2 , 940 GB NTFS. perfect
 
Ok, i got ntfs-3g installed and now when I turn the drive on, it comes up with a message that says "NTFS-3g: Volume not cleanly unmounted" It says I can either force or abort. If I force, will i lose the data on the drive? I know i ejected it on my PC before I turned it off. It tells me that it is recommended to attach the drive to a Windows computer and unmount it properly. My problem is that I sold my PC and no longer have access to a Window based PC at the moment.
 
I was able to take the external HD to work and hook it up to my PC. I have the Fantom Drive 1TB. There isn't any place you can eject it like a normal USB drive. What should I do now?
 
old-wiz said:
oops...forgot to mention ntfs-3g...
Click to expand...

Using this used to break Winclone which no longer recognised the bootcamp NTFS partition as a true NTFS drive.

Removed it and haven't looked back. I use VMware Fusion if I want to work with NTFS volumes on external drives.

Cheers,
 
May I have some advice please?

I have been using my 320gb iomega external hard drive (pretty sure its NTFS) to back up my Windows data from my home machine AND my work laptop. So its a back up for two different machines.

Now I've just bought an iMac :cool:. - to replace my home Windows PC. :apple: :apple:

What is the best way use my 320gb drive to still ensure:

- I can still use it to back up my data from my work laptop
- I can use it for backing up my iMac machine (does TimeMachine come into the picture here?)
- I can carry the external drive around to use as portable storage, and with the majority of friends being Windows users, I need Windows to be able to read/write to it.

With it currently being NTFS I know its not good enough for TimeMachine to work with it.

Oh, a point to note, all music and documents from my previous Windows machine is now copied over to my iMac.

Ideally I'd just like for my OSX iMac and my Windows laptop to both be able to read and write to the drive.

Any suggestions please? Just want to make sure I get this right...
 
cman-uk said:
Great! ...So what did you do?

There are many in the same position you were in!
Detailed steps on whats required and what to do would be great...
Click to expand...

OK. I'll finish the story for him:)
Had this same issue...same steps I did...got this same message about "disc wasn't removed properly". I chose "abort", move the disk to PC, "Safely Removed Hardware", plugged back to iMac AND it works! All data is intact and accessible!

good luck.
 
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