The Hummy drive is installed on a PC and I can see its contents. This is the result of humaxcheck 1: -d -c -w.
humaxcheck version 0.09W (c) xyz321
WARNING this may corrupt your Humax hard disk - do you wish to continue? [no]: yes
PARTITION 0
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36.av : Err Frag: 8, size: 3047937536 Alloc fat 1854432, dir 4618032
Allocation error: (fat blocks allocated != sizea)
File End error
Warning - File size error
768 cross-linked blocks found in file 36.av
271.av : Err Frag: 6, size: 349508096 Alloc fat 682816, dir 682816
768 cross-linked blocks found in file 271.av
345.av : Err Frag: 3, size: 1736613888 Alloc fat 655744, dir 656496
Allocation error: (fat blocks allocated != sizea)
File End error
Warning - File size error
Improper file termination in FAT
489.av : Err Frag: 4, size: 716747776 Alloc fat 462480, dir 1400224
Allocation error: (fat blocks allocated != sizea)
File End error
Warning - File size error
Improper file termination in FAT
0.av : Buf Frag: 69, size: 118202368 Alloc fat 7896752, dir 7896000
Humax calculated free space count: 24273068032 bytes
PARTITION 1
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Humax calculated free space count: 250839040 bytes
PARTITION 2
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Humax calculated free space count: 5366808576 bytes