Firstly, apologies for the problems you're encountering, I have a few general comments which might be helpful, please let me know I'm misunderstanding anything:
1. Repository access - we've noticed that in recent months of Windows 10 updates have caused some share access issues, it may be worth checking to see when the last updates were applied to see if this might be causing any problems. According to a few internet sources, these sometimes can be resolved by changing the repository to use IP address rather than server name in the share UNC path.
2. On the agent, there are some logs in c:\programdata\macrium\sitemanager\agentnetwork.log which contain the Win32 error codes for the network access attempts, these may help identify the problem.
3. With regard to the backup size and time, Site Manager 4814 includes all changes from the latest Reflect release - http://updates.macrium.com/reflect/v7/v7.2.4808/details7.2.4808.htm
. This includes the additional checks and features for data integrity mentioned in the 7.2.4797 release section - the first incremental taken in any backup set with the new Site Manager release will take longer and involve more disk IO to perform additional integrity checks against the source disks.
That said, a size disparity in incrementals like the one you're seeing is unusual and we'd like to investigate in more detail. We should also be able to provide some assistance with what's going on with the repository share access problems.
Can I ask that you open a support case via https://helpme.macrium.com/
and include a link to this forum post? We can then get the process of collecting logs and and reviewing them started and hopefully get things sorted out for you.
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