What are the acceptable and best file system formats for large capacity thumb drives?

The trend recently is to have computers come with only 256GB of storage and is not changeable. This is unsatisfactory to me so I suppose many people are going with high capacity thumb drives (2-8TB) as an external volume. This raises several questions for me.


1) They come with ExFAT formatting. I've read that it is not the best for keeping track of the files you store on it and data can be more easily lost. Is this correct? Is it fully compatible with the MacOS? I have been having troubles even getting it to mount on the desktop.


2) I have tried reformatting to APFS and sometimes it takes but then won't mount. So I reformat back to ExFAT and it won't mount. Does reformatting damage the drive?


3) I have to use the external volume large capacity Thumb Drives to store my largest folders which are Documents, Pictures, & Music. I can access them from my Desktop using aliases from the external volumes but I'm having a problem with the Photo Library which only looks in the the internal storage volume for its 'goto' Library folder. I have tried to correct the alias reference to the external volume drive but it will not accept it in an external volume. Is there a workaround for this ? My Photos Library is 145GB and my Music Library is 80GB and my Documents folder is 15GB. When they are all on the internal 256GB volume, it fills quickly and slows to a crawl or to a stop, and that is NOT acceptable. That is why I'm tying to operate them from an external Thumb Drive.

Mac mini, macOS 10.15

Posted on Mar 29, 2024 7:29 PM

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Posted on Mar 30, 2024 6:35 AM

You should not be using thumb drives for that much storage or as online drives that you rely upon. They are not sufficiently durable or reliable (regardless of brand) and are not built for that kind of use ... and I would add that any thumb drive that claims to be over 2TB should be suspect.


The problems you cited are indicative of problems with the flash drive itself not the formatting.


Use a good quality external SSD instead, bus powered if you require it. OWC makes some very nice enclosures (I suggest looking at the Mercury Elite Pro Mini). You can get a bare enclosure or one with an SSD already installed. For DIY, I have had great success with Samsung 870EVO SSD's. Others to consider - OWC Electra Pro, Crucial MX500, Crucial X9 or X10.

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Question marked as Top-ranking reply

Mar 30, 2024 6:35 AM in response to bdphourde

You should not be using thumb drives for that much storage or as online drives that you rely upon. They are not sufficiently durable or reliable (regardless of brand) and are not built for that kind of use ... and I would add that any thumb drive that claims to be over 2TB should be suspect.


The problems you cited are indicative of problems with the flash drive itself not the formatting.


Use a good quality external SSD instead, bus powered if you require it. OWC makes some very nice enclosures (I suggest looking at the Mercury Elite Pro Mini). You can get a bare enclosure or one with an SSD already installed. For DIY, I have had great success with Samsung 870EVO SSD's. Others to consider - OWC Electra Pro, Crucial MX500, Crucial X9 or X10.

Mar 30, 2024 5:35 PM in response to bdphourde

The others are absolutely correct.....use an SSD instead of a USB stick (aka thumb drive).


As for placing data on the external drive such as your Photo Library, Music Library, or Video Library......see these Apple articles for the correct way to place them on an external volume:

Move your Photos library to save space on your Mac - Apple Support


Change where your music files are stored on Mac - Apple Support


Move your iMovie for Mac library - Apple Support


If you want to place other data files on the external drive, then just make a new folder on the external drive, then add a shortcut to the sidebar of the Finder window for easy access to it.


It is definitely much easier to just purchase a computer with a large enough internal storage since if you forget the external drive, you will find you are missing important files.


Just make sure to have a good backup of your computer and all external media (including the cloud) which contains important & unique data. And no....you cannot place your backups on the external SSD holding your external libraries or other data files since the backup will not be a backup if that single external SSD fails.


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What are the acceptable and best file system formats for large capacity thumb drives?

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