DATA SRA archives use
How to unpack SRA (sequence reads archive).
To be able to use the reads contained in an SRA, one needs first to unpack it, which cannnot be done with usual decompression tools. Instead it is necessary to use the package "sra-toolkits", that can be downloaded on the NCBI website. To convert to fastq file, use the application fastq-dump: fastq-dump -A