If you have the second gen single bay/single drive My Cloud running v2.41.121, why not update to OS5? You may have to update to v2.42.115 first before updating to v5.29.102.
https://support-en.wd.com/app/products/product-detailweb/p/126
Not sure what you mean by it’s terminal and management is blocked. One would enable SSH access in the My Cloud Dashboard > Settings section to gain access to local SSH terminal access.
How to Access the My Cloud OS 3 Dashboard
How to Access WD My Cloud Using SSH (Secure Shell)
Steps to Turn On SSH (Secure Shell) on a My Cloud
Access Denied when SSH Login on My Cloud
WD terminated MyCloud.com remote access to the OS3 (v2.x and v4.x) firmware two years ago. If you want MyCloud.com access you would need to update to OS5 (v5.x firmware) if you have a second generation single bay My Cloud running v2.x firmware.
Trying to downgrade the firmware may be possible BUT Western Digital has generally blocked access to the older firmware on it’s website. See the following link for more on past firmware for single bay My Cloud devices and possible ways to roll back the firmware:
It appears the last three firmware versions are what can be downloaded from WD Support. For the v2.x firmware:
2.42.115 (1/18/2022): https://downloads.wdc.com/nas/My_Cloud_GLCR_2.42.115.bin
2.41.121 (11/17/2021): https://downloads.wdc.com/nas/My_Cloud_GLCR_2.41.121.bin
2.41.116 (12/08/2020): https://downloads.wdc.com/nas/My_Cloud_GLCR_2.41.116.bin
If you need older firmware than v2.41.116 you may have to see the archives others have created outside of WD that contain various firmware for the My Cloud devices. Example archive for the second gen single bay My Cloud:
https://wd.hides.su/wd/Cloud_gen2/frimware/
WARNING: One downgrades or uses the firmware sourced from non WD websites at their own risk!!!
Installing older firmware will have the security vulnerabilities that were otherwise patched in later firmware. This could potentially lead one’s My Cloud being compromised if that My Cloud is exposed to the Internet.
