My SanDisk USB shows that 40GB is used when I just copied a 10GB file after formatting
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I recently bought a 128GB USB from SanDisk.
Just as the title, after formatting the USB in exFAT format, I copied a folder whose capacity is around 10 GB. (There are lots of small files in it, so it took some time)
However, when I see in the Windows Explorer after copying the folder, it says that around 43 GB of the storage is occupied and now only 70 GB of the storage is free to use.
What the hell is happening and how should I deal with it??
Is my USB physically broken?
It is still weird because when I copied a single file with 7 GB capacity, it showed the remaining capacity correctly. (around 110 GB available)
usb
asked 3 hours ago
Felix Lee
165
add a comment |Â
up vote
1
down vote
favorite
I recently bought a 128GB USB from SanDisk.
Just as the title, after formatting the USB in exFAT format, I copied a folder whose capacity is around 10 GB. (There are lots of small files in it, so it took some time)
However, when I see in the Windows Explorer after copying the folder, it says that around 43 GB of the storage is occupied and now only 70 GB of the storage is free to use.
What the hell is happening and how should I deal with it??
Is my USB physically broken?
It is still weird because when I copied a single file with 7 GB capacity, it showed the remaining capacity correctly. (around 110 GB available)
usb
asked 3 hours ago
Felix Lee
165
2
If you right click on a small file and go to properties what does it display for "size" and "size on disk"
– Scott Chamberlain
3 hours ago
add a comment |Â
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I recently bought a 128GB USB from SanDisk.
Just as the title, after formatting the USB in exFAT format, I copied a folder whose capacity is around 10 GB. (There are lots of small files in it, so it took some time)
However, when I see in the Windows Explorer after copying the folder, it says that around 43 GB of the storage is occupied and now only 70 GB of the storage is free to use.
What the hell is happening and how should I deal with it??
Is my USB physically broken?
It is still weird because when I copied a single file with 7 GB capacity, it showed the remaining capacity correctly. (around 110 GB available)
usb
asked 3 hours ago
Felix Lee
165
I recently bought a 128GB USB from SanDisk.
Just as the title, after formatting the USB in exFAT format, I copied a folder whose capacity is around 10 GB. (There are lots of small files in it, so it took some time)
However, when I see in the Windows Explorer after copying the folder, it says that around 43 GB of the storage is occupied and now only 70 GB of the storage is free to use.
What the hell is happening and how should I deal with it??
Is my USB physically broken?
It is still weird because when I copied a single file with 7 GB capacity, it showed the remaining capacity correctly. (around 110 GB available)
usb
usb
asked 3 hours ago
Felix Lee
165
asked 3 hours ago
Felix Lee
165
asked 3 hours ago
Felix Lee
165
asked 3 hours ago
Felix Lee
165
asked 3 hours ago
Felix Lee
165
165
2
If you right click on a small file and go to properties what does it display for "size" and "size on disk"
– Scott Chamberlain
3 hours ago
add a comment |Â
2
If you right click on a small file and go to properties what does it display for "size" and "size on disk"
– Scott Chamberlain
3 hours ago
2
2
If you right click on a small file and go to properties what does it display for "size" and "size on disk"
– Scott Chamberlain
3 hours ago
If you right click on a small file and go to properties what does it display for "size" and "size on disk"
– Scott Chamberlain
3 hours ago
add a comment |Â
1 Answer
1
active
oldest
votes
up vote
4
down vote
You already answered your own question: There are lots of small files in it
Every file on an exFAT volume takes at least one blocksize. So a file of a single byte in size takes 4K - a size amplification of 1:4096. You are seing a size amplification of 4.3, which is very plausible with lots of small files.
You can check this hypothesis by packing the files with WinRAR and the zero compression settings, then copy this file to the USB stick.
answered 3 hours ago
Eugen Rieck
8,79121924
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
4
down vote
You already answered your own question: There are lots of small files in it
Every file on an exFAT volume takes at least one blocksize. So a file of a single byte in size takes 4K - a size amplification of 1:4096. You are seing a size amplification of 4.3, which is very plausible with lots of small files.
You can check this hypothesis by packing the files with WinRAR and the zero compression settings, then copy this file to the USB stick.
answered 3 hours ago
Eugen Rieck
8,79121924
add a comment |Â
up vote
4
down vote
You already answered your own question: There are lots of small files in it
Every file on an exFAT volume takes at least one blocksize. So a file of a single byte in size takes 4K - a size amplification of 1:4096. You are seing a size amplification of 4.3, which is very plausible with lots of small files.
You can check this hypothesis by packing the files with WinRAR and the zero compression settings, then copy this file to the USB stick.
answered 3 hours ago
Eugen Rieck
8,79121924
add a comment |Â
up vote
4
down vote
up vote
4
down vote
You already answered your own question: There are lots of small files in it
Every file on an exFAT volume takes at least one blocksize. So a file of a single byte in size takes 4K - a size amplification of 1:4096. You are seing a size amplification of 4.3, which is very plausible with lots of small files.
You can check this hypothesis by packing the files with WinRAR and the zero compression settings, then copy this file to the USB stick.
answered 3 hours ago
Eugen Rieck
8,79121924
You already answered your own question: There are lots of small files in it
Every file on an exFAT volume takes at least one blocksize. So a file of a single byte in size takes 4K - a size amplification of 1:4096. You are seing a size amplification of 4.3, which is very plausible with lots of small files.
You can check this hypothesis by packing the files with WinRAR and the zero compression settings, then copy this file to the USB stick.
answered 3 hours ago
Eugen Rieck
8,79121924
answered 3 hours ago
Eugen Rieck
8,79121924
answered 3 hours ago
Eugen Rieck
8,79121924
answered 3 hours ago
Eugen Rieck
8,79121924
8,79121924
add a comment |Â
add a comment |Â
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2
If you right click on a small file and go to properties what does it display for "size" and "size on disk"
– Scott Chamberlain
3 hours ago