3 sentences

1. 这个文件的大小约为五兆字节。

   zhè gè wén​jiàn de dà​xiǎo yuē wéi wǔ zhào zì​jié.

   The size of this file is about five megabytes.

   Source: Dong Chinese Dictionary

2. 一个字节通常由八个比特组成。

   yī gè zì​jié tōng​cháng yóu bā gè bǐ​tè zǔ​chéng.

   A byte usually consists of eight bits.

   Source: Dong Chinese Dictionary

3. 这部手机拥有两百吉字节的存储空间。

   zhè bù shǒu​jī yōng​yǒu liǎng​bǎi jí zì​jié de cún​chǔ kōng​jiān.

   This phone has 200 gigabytes of storage space.

   Source: Dong Chinese Dictionary