Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Why do I have 100GB of space missing?

I recently bought a new Retina Display 13" MacBook and restored the backup from my previous MacBook (which had nearly identitcal HD capacity). Because my other computer was nearly full, of course my new one is having the same issue. I've spent a lot of time going through everywhere I can think of to remove files and in doing so, I decided to compare the sizes of the main folders with the amount of space it was telling me I had, and it seems as though I have over 100GB (about 1/5 of my total space) that is "invisible" or I cannot find. Here is what I did:


Finder/Go/Computer/Macintosh HD: 452 GB used, 48 free


Then compared sizes of subfolders over 1GB (only two or three I'm leaving out because they take up negligible space):


Macintosh HD/Applications: 53.54GB

Macintosh HD/Library: 92.89GB

Macintosh HD/System: 6.51GB

Macintosh HD/Users/User/Documents: 6GB

Macintosh HD/Users/User/Downloads: 11.21GB

Macintosh HD/Users/User/DropBox: 4.06GB

Macintosh HD/Users/User/Movies: 1.29GB

Macintosh HD/Users/User/Music: 104GB

Macintosh HD/Users/User/Pictures: 46GB


Total: ~326GB


So when I hit "Get Info" on Macintosh HD, it says I'm using 452GB, but when I try to find all that space, all I can find is ~326GB.


I would really like to have that 100GB+ of space if at all possible. Is there a way to see hidden folders or something? I've deleted most all the files I can comfortably part with. Help?

MacBook Pro (Retina, 13-inch, Late 2013), OS X Mavericks (10.9.1), 512GB flash memory

Posted on Jan 13, 2014 11:29 PM

Reply
8 replies

Jan 14, 2014 12:08 AM in response to PS278

Ok so I have found the culprit but this leads to another question. I found out the Library folder under Users/~/Library/Application Support is taking up 100GB of space (I had to use a terminal command to see this foler which is why I didn't have it in the list above). However, I have the same folder elsewhere (this one was not hidden by default):


Macintosh HD/Library/Application Support


This folder is about 86GB. Surely there is some serious duplication going on here, possibly from restoring the Time Machine backup of my old computer? How can I know which ones are safe to delete?


Thanks

Jan 14, 2014 12:17 AM in response to PS278

Macintosh HD/Users/User/Movies: 1.29GB

Macintosh HD/Users/User/Music: 104GB

Macintosh HD/Users/User/Pictures: 46GB




clear cut case


You need to change the premise of your SSD use. 😊




see here:

Your Solid State Drive and having enough space inside your Macbook Air & Pro


Solid State Drive usage premise, or the “more space / upgrade SSD” question

There have been questions posed and positions taken by many people who are trying to use their Macbook Air or Pro’s solid state drive (SSD) as a mass media storage device, for either pictures, videos, massive music collections or all three combined; but this should not be the working premise of a ‘limited’ SSD and its use.

In which, it’s the case of those users with either 128GB, 256GB, or even 512GB of internal SSD space, that have or are running “out of space”, that questions are raised. The immediate premise of some users can sometimes be “(how to / if) upgrading my SSD” when in fact in nearly all instances another approach is the logical and sensible one that needs to be looked into and exercised.

Any Macbook containing a SSD should be idealized as a ‘working platform’ notebook containing all your applications, documents, and weekly or bi-weekly necessary files. All collections of media files such as pictures, music, and videos, unless directly needed should be kept off the notebook and on an external hard drive or likewise. While the ‘working platform’ premise is also the case with larger internal conventional hard drives of 1TB+, its implementation isn't as critical except in terms of data protection.

Realistically, you should at most coordinate roughly 20 to 25% of your total SSD space to all audio-video personal use media (picture / music / video collections), leaving the remaining amount on an external HD.

Nobody should consider any notebook a data storage device at any time under any circumstance, rather a data creation, sending, and manipulation device; and in the case of a SSD, this is more important for purposes of having sufficient working space on the SSD and reducing SSD ‘bloat’ in which cases someone is wrongly attempting to use the SSD space as a large media storage nexus.

The rare exception to the collective usage and premise of SSD use in which a much larger SSD is truly needed are for those in video and photography professions that require both the extremely fast speeds of the SSD and the onboard storage for large and or many video and photography files. However this also falls under the premise of a ‘working platform’ for such peoples rather than the intent of many who are using the SSD as passive and static data storage for media files very infrequently needed or accessed.

All on-notebook data collections should be logically approached as to necessity, and evaluated as to whether it is active or passive data that likely doesn’t need to be on the notebook, allocations of space-percentages to as-needed work and use, apportioning space for your entertainment media, and questioning whether it should it be on the notebook for more than short-term consumption.

Considerations should be made in the mind of any user in differentiating the necessary system data (System hub) comprising the Mac OSX, applications, necessary documents that both must and should be on your internal SSD, and that of the users personal data (Data hub) comprising created files, pictures, music, videos, PDF files, data created or being created and otherwise, that likely unless being used soon or often should be parked on an external hard drive for consumption, or temporarily loading onto the internal SSD.

You both can and should purchase whichever SSD size you need or see fit, but even in the case of the largest of SSD, unless use-considerations are made, and SSD spaces are allocated as should be the case indicated above, one can easily and immediately run into this quandary of “needing more internal SSD space”, in which instance a different approach in usage must then be implemented.


However it is almost always the case, that such large media files are wanted to be stored internally rather than actually needed, in which case the external HD is both prudent as well as necessary. Additionally costs per MB are infinitely less on an external HD than an internal SSD in any consideration of data expansion needs.




A Professional Example

In the case of a Macbook Air or Macbook Pro Retina with ‘limited’ storage on the SSD, this distinction becomes more important in that in an ever rapidly increasing file-size world, you keep vital large media files, pics, video, PDF collections, music off your SSD and archived on external storage, for sake of the necessary room for your system to have free space to operate, store future applications and general workspace.


➕You should also never be put in the position of considering “deleting things” on your Macbook SSD in order to ‘make space’. This is especially what your external HD is for.

Professionals who create and import very large amounts of data have almost no change in the available space on their notebooks internal SSD because they are constantly archiving data to arrays of external or networked HD.

Or in the case of the consumer this means you keep folders for large imported or created data and you ritually offload and archive this data for safekeeping, not only to safeguard the data in case your Macbook has a SSD crash, or gets stolen, but importantly in keeping the ‘breathing room’ open for your notebook to operate, expand, create files, add applications, for your APPS to create temp files, and for general operation.



Slim USB3 1TB external hard drive

User uploaded file

External Hard Drives

External hard drives are both extremely cheap and regardless of the size of your internal SSD (or even internal hard drive if the case), you need an external hard drive with your SSD equipped Macbook for several reasons:


1. Data backup and protection.

2. Redundancy for important data.

3. Necessitated ideal space for large media files for collections of pictures, videos, and music etc.

While ever changing in price, typical portable 2.5” external hard drives in USB3 run roughly $65 for 1TB or $120 for 2TB small portable USB3 hard drives. Such drives range in thickness between 5mm and 15mm, with recent improvements in storage of 500GB drives in 5mm profiles.

There is almost no premise in which a small 12mm thick 1 Terabyte USB hard drive cannot be taken along with any Macbook as an external large storage extension inside any Macbook carry case or pouch. Typically such external HD profiles are not much bigger than a deck of cards.

External hard drives are a foregone necessity for purchase with any Macbook for at the very least Time Machine backups, data redundancies, and ideally for large media storage.

Jan 14, 2014 9:47 AM in response to PS278

PS278 wrote:


Ok so I have found the culprit but this leads to another question. I found out the Library folder under Users/~/Library/Application Support is taking up 100GB of space (I had to use a terminal command to see this foler which is why I didn't have it in the list above). However, I have the same folder elsewhere (this one was not hidden by default):


Macintosh HD/Library/Application Support


This folder is about 86GB. Surely there is some serious duplication going on here, possibly from restoring the Time Machine backup of my old computer? How can I know which ones are safe to delete?


Thanks

Different Libraries for Different things (there are 3 libraries in total, they should all be left alone).

Mar 7, 2015 5:37 AM in response to Csound1

Did you find a solution for your lost space? I have a macbook Pro late 2013 256 GB SSD and discovered that it suddenly lost a lot of space. After checking with Omnidisc sweeper I found that the total amount of files it detected was 30GB less than the amount my hard drive reported as 'used'


When I check 'about this mac' it says that I have 65 GB unused. But when I chaeck the amount of used space Omnidiscsweeper detects I should have aroun 90GB of unused space.


The amount that the finder detects as used is the same as the amount that omnidiscsweeper detects so 30GB is missing. It can be that no garbage collection takes place on the drive. How do I check if trim support is switched on? According to the info in 'about this mac' it is enabled. But how to check that it really works?


I have the original SSD that came with my computer.

Nov 1, 2015 3:20 PM in response to PS278

Hi,


It seems I have a similar problem, that is however even more difficult to decipher 🙂

I have a i5 Mac Mini with 1Tb HDD (999.35Gb Capacity)


On the root folder I have 10.27Gb Applications / 2.78Gb Library / 7.61Gb System and 770.7Gb Users. That is a total of 791.36Gb.

However the available space in Inspector, Disk Utility and CC Cleaner is 15.77 Gb !!! 😟


In my case that results in 192 Gb of disk space unaccounted for.

Have you had any success or any idea on how to tackle that?

Why do I have 100GB of space missing?

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple ID.