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hajime

macrumors 604
Original poster
Jul 23, 2007
7,921
1,311
Hi, if I connect an external drive to an iPad and format, what format will that be? Can the files be read and modified by Mac and Windows?
 

rui no onna

Contributor
Oct 25, 2013
14,916
13,260
It will be whatever format the drive originally shipped with or you formatted it to on your computer.

iPadOS supports read/write to FAT, exFAT and Apple formats (HFS, APFS, etc). It also supports NTFS but just in read-only mode.

Most flash drives come pre-formatted as either FAT or exFAT. Caveat, iPadOS has been known to randomly corrupt FAT/exFAT formatted drives so make sure you have backups.
 

hajime

macrumors 604
Original poster
Jul 23, 2007
7,921
1,311
It will be whatever format the drive originally shipped with or you formatted it to on your computer.

iPadOS supports read/write to FAT, exFAT and Apple formats (HFS, APFS, etc). It also supports NTFS but just in read-only mode.

Most flash drives come pre-formatted as either FAT or exFAT. Caveat, iPadOS has been known to randomly corrupt FAT/exFAT formatted drives so make sure you have backups.

Thanks for your info. Why it corrupts FAR/exFAT formatted drives? I consider to buy a 2.5" SSD or a HDD to backup photos on my iPad/iPhone and data on my PC. So exFAT.

Is it a bad idea to use HDD with iPad? At least we need to turn off the iPad as it has no Reject function. Anything else that I need to be aware of?
 

hajime

macrumors 604
Original poster
Jul 23, 2007
7,921
1,311
That would be one of your 3-2-1 backups. You need another 2.

So because it is one of my 3-2-1 backups, I don't need to worry too much about exFAT formatted drive getting corrupted?

In this case, for backuping up photos and videos on iPad and iPhone, I shall have another backup or two in drive formatted in HFS or APFS?
 

sparksd

macrumors G3
Jun 7, 2015
9,993
34,274
Seattle WA
Thanks for your info. Why it corrupts FAR/exFAT formatted drives? I consider to buy a 2.5" SSD or a HDD to backup photos on my iPad/iPhone and data on my PC. So exFAT.

Is it a bad idea to use HDD with iPad? At least we need to turn off the iPad as it has no Reject function. Anything else that I need to be aware of?

Regarding exFAT, I had a long thread on it -

https://forums.macrumors.com/threads/file-corruption-on-copy-to-external-storage.2235171/

Cliff Notes: The Files app would corrupt attached exFAT drives. That may now be fixed but I don't trust it. I long ago switched to using FileBrowser Pro for my external drive interaction - directly-attached HDDs, SSDs and cards in card readers and devices attached vi a USB-C hub. I have never run into a problem using FB Pro.
 

RevTEG

macrumors 65816
Oct 28, 2012
1,364
1,237
San Jose, Ca
Admittedly I’m not an external drive “pro”, but we use external HD’s and iPads extensively in our business. Never had a single failure issue. Zero. Obviously, anything can break. We just haven’t had the issues some are concerned about.
 

sparksd

macrumors G3
Jun 7, 2015
9,993
34,274
Seattle WA
Admittedly I’m not an external drive “pro”, but we use external HD’s and iPads extensively in our business. Never had a single failure issue. Zero. Obviously, anything can break. We just haven’t had the issues some are concerned about.

What format are the drives? That's a key element.
 
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