v pruvodci novym diskem /sekce volume format - zatrhnout dynamic (lze to pouze u noveho disku ne jiz naformatovaneho)
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je to nova funkce takze obecne se zatim nedoporucuje (fragmentace a s tim spojene pozadavky na alokacni tabulku to cele u sifrovanych dat=nezabezpecenost)

Dynamic
Dynamic TrueCrypt container is a pre-allocated NTFS sparse file whose physical size (actual disk
space used) grows as new data is added to it. Note that the physical size of the container (actual
disk space that the container uses) will not decrease when files are deleted on the TrueCrypt
volume. The physical size of the container can only increase up to the maximum value that is
specified by the user during the volume creation process. After the maximum specified size is
reached, the physical size of the container will remain constant.
Note that sparse files can only be created in the NTFS file system. If you are creating a container
in the FAT file system, the option Dynamic will be disabled (“greyed out”).
Note that the size of a dynamic (sparse-file-hosted) TrueCrypt volume reported by Windows and by
TrueCrypt will always be equal to its maximum size (which you specify when creating the volume).
To find out current physical size of the container (actual disk space it uses), right-click the
container file (in a Windows Explorer window, not in TrueCrypt), then select Properties and see the
Size on disk value.
WARNING: Performance of dynamic (sparse-file-hosted) TrueCrypt volumes is significantly worse
than performance of regular volumes. Dynamic (sparse-file-hosted) TrueCrypt volumes are also
less secure, because it is possible to tell which volume sectors are unused. Furthermore, if data is
written to a dynamic volume when there is not enough free space in its host file system, the
encrypted file system may get corrupted.