backup file size doubling & conflicting files in .SAJ folder

SOLVED

Hi, 

I have been  using  version 2017 accounting 50 . I recently installed version 2019 accounting 50 and converted the data. I found when I backup my computer at closing, the size of the cabinet file is doubling, but I only entered 80 entries.I am wondering if it will continue increasing.  And also I noticed under the .SAJ folder some docs appears repeat two or three lines, and one of them shows (conflicted copy). Such as below:

ib_buffer_pool 

ib-buff_pool (Lisa's conflicted copy XXX)

ib-logfile1

ib-logfile1(Lisa's conflicted copy XXX)

ib-logfile1(Lisa's conflicted copy XXX)

ibdata1

ibdata1(Lisa's conflicted copy XXX)

Please help me to find out what problem is. 

Thank you

Lisa