Why is there such a big difference between "Size" and "Size on disk"?

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Music by Eric Matyas
https://www.soundimage.org
Track title: Isolated

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Chapters
00:00 Question
00:51 Accepted answer (Score 310)
05:28 Answer 2 (Score 45)
06:45 Answer 3 (Score 26)
11:29 Answer 4 (Score 21)
12:44 Thank you

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Full question
https://superuser.com/questions/704218/w...

Accepted answer links:
[gladiator2345 suggested]: https://superuser.com/a/704222/117590
[Source]: https://android.stackexchange.com/a/3843...
[Braiam]: https://superuser.com/users/235569/braia...

Answer 2 links:
[Bob said in his answer is true]: https://superuser.com/a/704220/235569

Answer 3 links:
[healthcare industry ransomware]: https://blog.getcryptostopper.com/bitpay...
[Resource fork]: https://en.wikipedia.org/wiki/Resource_f...
[alternate data stream]: https://docs.microsoft.com/en-us/archive...
[Wikipedia]: https://en.wikipedia.org/wiki/NTFS#Alter...)
[Get-Item -Stream]: https://docs.microsoft.com/en-us/powersh...
[dir /r]: https://docs.microsoft.com/en-us/powersh...
[streams]: https://docs.microsoft.com/en-us/sysinte...
[lads]: https://www.aldeid.com/wiki/LADS
[AlternateStreamView]: https://www.nirsoft.net/utils/alternate_...
[Sean Pierce]: https://www.sans.org/cyber-security-summ...
[Marc Ochsenmeier]: https://www.winitor.com/pdf/NtfsAlternat...
[ransomware BitPaymer]: https://www.zdnet.com/article/major-germ.../
[copies itself in a legitimate file as an ADS]: https://forums.juniper.net/t5/Threat-Res...
[hides using ADS]: https://cdn2.hubspot.net/hubfs/3354902/C...
[cluster size]: https://macrorit.com/partition-magic-man...

Answer 4 links:
[Microsoft]: http://support.microsoft.com/kb/303079

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Tags
#filesystems

#avk47