參照以下連結
http://forums.about.com/n/pfx/forum.aspx?tsn=1&nav=messages&webtag=ab-delphi&tid=15327

她會列出類似下面的資訊, USB HD 也當成一般 HD

[quote]
I got Drive a & it's a REMOVABLE DRIVE
& there is no disk inserted.

I got Drive b & it's a DRIVE without ROOT Directory
& there is no disk inserted.

I got Drive c & it's a FIXED DRIVE
the Root Path Name is : c:\
With Volume Name as:
Serial Number = 30712619
& the File System is: NTFS
No. of Sector per Cluster = 8 Clutsers.
No. of Bytes per Sector = 512 Bytes.
No. of Free Clusters = 4407335 Clusters.
No. of Total Cluster = 19535032 Clusters.
Free Space: 18,052,444,160 Bytes. = 16.813 GB.
Used Space: 61,963,046,912 Bytes. = 57.708 GB.
Total Space: 80,015,491,072 Bytes. = 74.520 GB.
77% of Bytes are used.
I got Drive f:\ & it's DRIVE_CDROM
& there is no disk inserted.
I got Drive i & it's a FIXED DRIVE
the Root Path Name is : i:\
With Volume Name as: USB120G
Serial Number = 344E8FA5
& the File System is: NTFS
No. of Sector per Cluster = 8 Clutsers.
No. of Bytes per Sector = 512 Bytes.
No. of Free Clusters = 600392 Clusters.
No. of Total Cluster = 30156005 Clusters.
Free Space: 2,459,205,632 Bytes. = 2.290 GB.
Used Space: 121,059,790,848 Bytes. = 112.746 GB.
Total Space: 123,518,996,480 Bytes. = 115.036 GB.
98% of Bytes are used.

[/quote]

------
能力不足，求助於人；有能力時，幫幫別人；如果您滿意答覆，請適時結案！

子曰：問有三種，不懂則問，雖懂有疑則問，雖懂而想知更多則問！