ＨＤＤ

Freq.FrequencyTop 10,000

Meanings

1

hard disk drive; HDD

Computing term for a data storage device using magnetic disks. Often contrasted with SSD (solid-state drive).

See also: ハードディスク

このパソコンには１ＴＢのＨＤＤが搭とう載さいされています。
This PC is equipped with a 1 TB HDD.
ＨＤＤからＳＳＤに換かん装そうしたら、起き動どうが速はやくなった。
After replacing the HDD with an SSD, booting became faster.

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Usage patterns

〈物もの〉にデータを保ほ存ぞんするto save data to a device
写しゃ真しんをＨＤＤに保ほ存ぞんしておいた。
I saved the photos to the HDD.
〈物もの〉が壊こわれるfor a drive to fail/break
急きゅうにＨＤＤが壊こわれてデータが消きえてしまった。
The HDD suddenly failed and I lost all my data.
〈物もの〉を増ぞう設せつするto add an additional drive
容よう量りょうが足たりないのでＨＤＤを増ぞう設せつした。
I added an extra HDD because I was running out of storage space.

Related words

ハードディスク
ハードディスク refers to the physical disk itself, while ＨＤＤ (hard disk drive) refers to the whole storage unit including the disk and mechanism, though the two are often used interchangeably.

Opposites

SSD
ＨＤＤ stores data on spinning magnetic disks, while ＳＳＤ uses flash memory with no moving parts, making it faster but more expensive.

Don't confuse with

ＨＤ
ＨＤＤ specifically means a hard disk drive, whereas ＨＤ can refer to a hard disk or to several unrelated things like high definition or hemodialysis.
SSD
SSD uses flash memory and has no moving parts, while HDD (hard disk drive) stores data magnetically on spinning platters, making SSD faster but often more expensive per gigabyte.

Counted with

台だいN4
stand; base; platform; table; rack · setting (of a gem); mounting · stock (in grafting) · counter for machines and vehicles · level; mark; range; decade (of one's life) · tall building (with a fine view); observation platform · plateau; heights

Etymology

Initialism of English 'hard disk drive'. Borrowed directly into Japanese as a technical term.