Update README.md

README.md

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 ### Dataset Summary
 This dataset contains datas being collected from Genbank. The dataset is organized in a way that it separate all the genes from an DNA , and was classified according to the region and coding type. In that way, people could get more detailed information regarding each DNA sequences.
-The dataset also contain source, which is the whole DNA sequence, where the user can use it to compare to each segment to see the exact location. The dataset contains huge amound of files with about 200 million data and 300-400 GB storage space. Therefore user can specify the number
-of files they are going to use by using the code below according to their own need; otherwise, all the files would be downloaded which is 937 files.
+The dataset also contain source, which is the whole DNA sequence, where the user can use it to compare to each segment to see the exact location. The dataset contains 937 files with about 200 million data and 300-400 GB storage space. Therefore user can specify the number
+of files they are going to use by using the code below according to their own needs. If user want to download all of files, they can enter 937 as second arguement.
 ```python 
 datasets.load_dataset('wyxu/Genome_database', num_urls = number of file you want to use)
 ```