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Electronics
Storage is sold on one number — peak MB/s — that you'll only see for the first few seconds of a big copy. What decides real speed and lifespan is the connection type, flash type, cache, endurance rating and, for memory cards, the video speed class.
Quick answer
Internal: 4.0 with flash is the sweet spot.
Portable: USB 3.2 Gen 2 (10 Gbps) suits most; USB4 only for editing off the drive.
Check sustained write speed and endurance, not peak MB/s.
Hard drives are for cheap backup, not for running your system.
A few questions about your situation, not about the product.
Add one short need not covered above.
Answer all 2 questions to see the spec sheet to shop with.
For electronics the expensive failures are the display, the board and the battery. Extended cover is worth it only when it names those parts and offers a repair path in your city.
Ask these five questions
Usually not covered
Rule of thumb: worth considering on a high-value device you carry around, rarely worth it on a low-cost one where a plan costs more than ~15% of the price.
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How the drive talks to the computer.
Why it matters
4.0 (5,000–7,400 MB/s) is the value sweet spot; caps at ~550 MB/s.
What to check
5.0 runs hot and rarely speeds up everyday work — check your slot supports it.
How data is stored on the chips, and whether there's a memory buffer.
Why it matters
with stays fast under load and lasts longer — best for a main drive.
What to check
drives can slow to hard-drive speeds once their cache fills.
Speed after the fast cache runs out during a long copy.
Why it matters
Copying 100 GB of video is decided by this number, not the peak.
What to check
Budget portable SSDs can fall from 1,000 MB/s to under 150 MB/s mid-copy.
Terabytes you can write before wear-out.
Why it matters
About 600 per 1 TB plus a 5-year warranty is a solid drive.
What to check
Warranty ends at the limit even if the years haven't run out.
USB 3.2 Gen 2, Gen 2x2 and USB4/Thunderbolt.
Why it matters
10 Gbps (~1,000 MB/s) works almost everywhere; 40 Gbps enables editing straight off the drive.
What to check
Gen 2x2 (20 Gbps) drives drop to 10 Gbps on most laptops and Macs.
Guaranteed minimum write speed and app performance class.
Why it matters
V30 handles normal 4K; V60/V90 for high-bitrate video and long RAW bursts.
What to check
'Up to 200 MB/s' is read speed — the V rating is the write guarantee.
1 TB 4.0 : ₹6,000–₹9,000 (≈$72–$110). 1 TB portable SSD: ₹7,000–₹11,000 (≈$84–$130). 4 TB backup hard drive: ₹9,000–₹12,000 (≈$110–$140).