Hi, i got the same symptoms, but in my case the reason seems to be not Httrack
(versions tested from 2012 and 2013), but the combination of trucrypt 7.1a and
FAT32 file system on my partitions (70+280 GB). System Win XP SP3. After
writing 16271 small image-files to one directory, writing of additional files
were blocked. Httrack waited, but a file manager gave the hint when trying out
to copy additional files manually. Writing files to other directories on the
same drive were still possible. Also writing much more files in the same
directory by using uncrypted FAT32 was no problem. Finally I started 'convert'
to NTFS here, stopped investigation.