split - split a file into pieces
split [OPTION]... [FILE [PREFIX]]
Output pieces of FILE to PREFIXaa, PREFIXab, …; default size is 1000
lines, and default PREFIX is x.
With no FILE, or when FILE is -, read standard input.
-b SIZE
The SIZE argument is an integer and optional unit (example: 10K is
10*1024).
Unix Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,…
(powers of 1000).
macOS Units are m or b.
tar zcf - content | split -b 1024m - cloudbackup.tar.gz.
join/untar with decompression:
cat cloudbackup.tar.gz.* | tar zxvf -