Portable photo storage devices

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As every digital travel photographer, I am comfronted to the problem of storing a large number of images on a long trip. The cost per Mb of Compact Flash cards is getting lower and lower, but the files are also getting larger every time a new SLR is out. 

Sometimes you can take your laptop with you and have ample storage size, but if you want to travel light, another solution is portable photo storage devices
A number of these exist, in various sizes or features. The following tables synthesize the data I could find on this subject. 

Storage device list

Digital Foci Picture Porter 35

Capacity 350 Gb
Connexion type USB 2.0 (compatible USB1.1)
Weight 400g
Cards accepted CompactFlash*, MultiMedia Card, RS-MMC, SD Card, SDHC card, miniSD, Memory Stick, MS PRO, MS Duo, xD-Picture card
Energy source 3.7V 2800mAh replaceable rechargeable Polymer Li-Ion battery
Battery operating time Up to 4 hours of continuous video playback; Up to 3 hours of memory card copy
Features 2.5" 5400 RPM SATA hard drive
3.5" color TFT LCD screen with backlight (320 x 240 pixels)

Sanho HyperDrive ColorSpace UDMA 500GB

Capacity 500 Gb
Connexion type USB 2.0 Hi-Speed Mode via UDMA66
USB 1.1 backwards compatible
Weight 298g
Cards accepted 2 slots supporting 14 memory card formats
CompactFlash CF Type I/II, MicroDrive MD, Secure Digital SD, SDHC, MultiMedia Card MMC, MemoryStick MS, MS MagicGate, MS Select, MS PRO, MS PRO MagicGate, xD, xD Type H/M
Energy source User replaceable rechargeable 18650 Li-ion
Battery operating time Up to 250GB per battery
Features High Res 3.2" color LCD screen displays JPEG & RAW
2.5" SATA ATA-5, 9.5mm thickness

Wolverine PicPac II

Capacity 160 to 500 Gb (2.5" hdd)
Connexion type High speed USB2.0 (compatible with USB1.1)
Weight 220g
Cards accepted Compact Flash (CF) MicroDrive (MD) Sony Memory Stick (MS) Sony MS Pro Sony MS Duo Sony MS Pro Duo Secure Digital (SD) Secure Digital High Capacity (SDHC) Multimedia Card (MMC) Micro SD XD Card
Energy source Rechargeable battery and 100V-240V AC-DC external power adapter
Battery operating time Up to 15 Gb on a single charge
Features Status Display Screen (LCD) - (no picture preview)