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Adata SD700 USB 3.1 256GB vs. Seagate Expansion Portable Drive 2TB + 7
Ethernet connection
No
No
No
No
No
No
No
No
Wireless connection
None
None
None
None
None
None
None
None
eSATA
No
No
No
No
No
No
No
No
Firewire
No
No
No
No
No
No
No
No
Thunderbolt
No
No
No
No
No
No
No
No
USB
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Type of USB connector
Micro-USB, USB (Type C)
Micro-USB, USB (Type A), USB (Type C)
USB (Type A)
Micro-USB
Micro-USB, USB (Type A)
Micro-USB, USB (Type A)
Micro-USB
Micro-USB, USB (Type A)
Micro-USB
USB version
2.0
3 (Gen 1)
3 (Gen 1)
3 (Gen 1)
3 (Gen 1)
3 (Gen 1)
3 (Gen 1)
3 (Gen 1)
3 (Gen 1)
Available colours
Black, Yellow, Green
Black, Blue, Red
Black
Black
Black, Red
Black, Silver, Grey, Blue
Black, White, Blue, Red
Black
Black
Dimensions (WxHxD)
Depth
83.5 mm
117 mm
41 mm
195 mm
117 mm
111 mm
107.2 mm
117 mm
36.6 mm
Height
13.9 mm
14.8 mm
118 mm
44 mm
20.9 mm
21 mm
19.15 mm
14.8 mm
120.6 mm
Width
83.5 mm
80 mm
198 mm
125 mm
80 mm
82.4 mm
75 mm
80 mm
176 mm
Form factor
2.5 inches
2.5 inches
3.5 inches
3.5 inches
2.5 inches
2.5 inches
2.5 inches
2.5 inches
3.5 inches
Product weight
100 g
170 g
1060 g
980 g
236 g
234 g
210 g
170 g
950 g
Features
Display
Built-in support for encryption
Cache size
8 MB
RAID
No
No
No
No
No
No
No
No
Power management
USB
USB
Mains
Mains
USB
USB
USB
USB
Mains
Number of hard drives
1
1
1
1
1
1
1
1
Rotational speed
5400 RPM
7200 RPM
7200 RPM
5400 RPM
5400 RPM
5400 RPM
5700 RPM
Storage capacity
0.26 TB
2 TB
6 TB
12 TB
4 TB
2 TB
4 TB
1 TB
8 TB
Price/TB
119.23 £/TB
27 £/TB
16.33 £/TB
22.33 £/TB
20.75 £/TB
20.5 £/TB
21.5 £/TB
36 £/TB
16.38 £/TB