2017 MacBooks have a soldered SSD to the logic board and it is not re-moveable so I am not sure what you mean by a hard disc reader. If you need to access the internal SSD of your MacBook if it has some issue then I guess you need to try in [link|https://support.apple.com/en-ph/guide/mac-help/mchlp1443/mac|Target Mode] but you will need another MacBook to do so and the correct [link|https://www.amazon.com/apple-thunderbolt-cable/s?k=apple+thunderbolt+cable|Thunderbolt cable] to connect them together with.
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[link|https://www.amazon.com/External-Hard-Drives-Storage-Add-Ons/b?ie=UTF8&node=595048|Any External HDD or SSD] will be readable & writable by your system providing it is [link|https://support.apple.com/en-ph/guide/disk-utility/dsku19ed921c/mac|formatted] correctly. You will just need a [link|https://www.amazon.com/usb-c/s?k=usb+c+to+usb|USB Type-C adapter] to use with the external drive. Hope that helped.
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[link|https://www.amazon.com/External-Hard-Drives-Storage-Add-Ons/b?ie=UTF8&node=595048|Any External HDD or SSD] will be readable & writable by your system providing it is [link|https://support.apple.com/en-ph/guide/disk-utility/dsku19ed921c/mac|formatted] correctly. You will likely need a [link|https://www.amazon.com/usb-c/s?k=usb+c+to+usb|USB Type-C adapter] to use with the external drive. Hope that helped.
2017 MacBooks have a soldered SSD to the logic board and it is not re-moveable so I am not sure what you mean by a hard disc reader. If you need to access the internal SSD of your MacBook if it has some issue then I guess you need to try in [link|https://support.apple.com/en-ph/guide/mac-help/mchlp1443/mac|Target Mode] but you will need another MacBook to do so and the correct [link|https://www.amazon.com/apple-thunderbolt-cable/s?k=apple+thunderbolt+cable|Thunderbolt cable] to connect them together with.
[link|https://www.amazon.com/External-Hard-Drives-Storage-Add-Ons/b?ie=UTF8&node=595048|Any External HDD or SSD] will be readable & writable by your system providing it is [link|https://support.apple.com/en-ph/guide/disk-utility/dsku19ed921c/mac|formatted] correctly. You will just need a [link|https://www.amazon.com/usb-c/s?k=usb+c+to+usb|USB Type-C adapter] to use with the external drive. Hope that helped.