The box could scan files under 30 MB without difficulty but could not deal with files larger than 30 MB.

该盒子可毫无困难地扫描30兆以下的文件，但30Mb以上的就不行了。

youdao

The box could scan files under 30 MB without difficulty but could not deal with files larger than 30 MB.

该盒子可毫无困难地扫描30兆以下的文件，但30Mb以上的就不行了。

youdao