# Problem in dowloading file in Galaxy Europe

**URL:** <https://help.galaxyproject.org/t/problem-in-dowloading-file-in-galaxy-europe/9073>\
**Category:** usegalaxy.eu support\
**Tags:** fastqsanger\
**Created:** [November 21, 2022, 11:47am UTC](https://help.galaxyproject.org/t/problem-in-dowloading-file-in-galaxy-europe/9073 "2022-11-21T11:47:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![federica](https://avatars.discourse-cdn.com/v4/letter/f/977dab/32.png) [@federica](https://help.galaxyproject.org/u/federica)\
**Post date:** [November 21, 2022, 11:47am UTC](https://help.galaxyproject.org/t/problem-in-dowloading-file-in-galaxy-europe/9073/1 "2022-11-21T11:47:43Z")

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Hello, I need to dowload my files (they are FASTQ in fastqsanger.gz format) from Galaxy. I concatenated them in August by **Concatenate datasets** tail-to-head (Galaxy Version 1.0.0). Today, my merged file, are not the same and they appear as “uncompressed” and if I run the job again, they are not in fastqsanger.gz format but in fastqsanger and it seems that I used the commend **arb.gz-to-arb** converter (Galaxy Version 1.0.0). I never have used this command. Is it a problem from Galaxy? How can I dowload my job?

Thanks in advance  
Federica

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**Author:** ![igor](https://avatars.discourse-cdn.com/v4/letter/i/dec6dc/32.png) [@igor](https://help.galaxyproject.org/u/igor)\
**Post date:** [November 23, 2022, 10:43am UTC](https://help.galaxyproject.org/t/problem-in-dowloading-file-in-galaxy-europe/9073/2 "2022-11-23T10:43:40Z")

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Hi @federica  
I concatenated twp gzipped fastq files using the same version of Concatenate datasets, and the output is has fastqsanger.gz datatype, and it is a binary (compressed) file. Do you see datasets with identical number, one with compressed (gzipped) reads, and another is a plain text fastq? If you have original files, maybe just re-run the concatenate job and download the results. Technically, you can compressed fastqsanger into fastqsanger.gz through Edit Attributes (pencil icon) \> Convert tab \> select an appropriate option, the one with fastqsanger.gz, but this is assuming you have a correct datatype assigned to data. Datatype is just a label, and users can manually change datatypes.  
Kind regards,  
Igor