
Questions & Answers about deetayouryou ga ookii.
が marks データ容量 as the grammatical subject of 大きい.
So the structure is basically:
- データ容量 = data capacity / storage size
- が = subject marker
- 大きい = is large
This is a very normal pattern in Japanese:
[noun] が [i-adjective]
For example:
- 音が大きい。 = The sound is loud.
- 部屋が広い。 = The room is spacious.
- データ容量が大きい。 = The data capacity / data size is large.
If you used は instead, the nuance would shift more toward topic or contrast:
- データ容量は大きい。
This can sound like:
- “As for the data capacity, it’s large.”
- “The data capacity is large, though maybe something else is not.”
So が is the more neutral choice if you are simply stating that the data capacity is large.