Narrations brought forward by brother Hani to state the Prophet (SAW) had many possessions before he (SAW passed away.
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The issue is that the Prophet PBUH had several possessions before he died, one of them is a piece of land called Fadak, So after he PBUH passed away his daughter Fatima (ra) came to ask the Caliph of the Muslims Abu Bakr (ra) about the inheritance and her share from the land but she did not know that the Prophet PBUH said:
The Prophet PBUH said: The learned(Scholars) are the heirs of the Prophets, and the Prophets leave neither dinar nor dirham, leaving only knowledge, and he who takes it takes an abundant portion.
(Sunan Abu Dawood, Book #25, Hadith #3634)
Hadith: SAHIH
And he also said:
Narrated Abu Huraira RAA: Allah's Apostle said, "My heirs will not inherit a dinar or a Dirham (i.e. money), for whatever I leave excluding the adequate support of my wives(Nafaqah) and the wages of my employees (All else) is given in charity."
(Sahih al bukhari Book #51, Hadith #37)
Hadith: SAHIH
Narrated Amr bin Al-Harith RAA: (The brother of the wife of Allah's Apostle. Juwaira bint Al-Harith) When Allah's Apostle died, he did not leave any Dirham or dinar (i.e. money), a slave or a slave woman or anything else except his white mule, his arms and a piece of land which he had given in charity .
(Sahih al bukhari - Book #51, Hadith #2)
Hadith: SAHIH
Also:
Narrated 'Urwa RAA: 'Aisha said, "When Allah's Apostle died, his wives intended to send 'Uthman to Abu Bakr asking him for their share of the inheritance." Then 'Aisha said to them, "Didn't Allah's Apostle say, 'Our (Apostles') property is not to be inherited, and whatever we leave is to be spent in charity?'"
[Sahih al Bukhari]
In a Long narration al Abbas RAA and fatima bint Muhammad RAA came to the caliph Abu Bakr RAA to ask for their share of a Land (Fadak) left by the Prophet PBUH:
Abu Bakr said, "Allah's Apostle said, 'We (Prophets), our property is not inherited, and whatever we leave is Sadaqa, but Muhammad's Family can eat from this property, i.e. Allah's property, but they have no right to take more than the food they need.' By Allah! I will not bring any change in dealing with the Sadaqa of the Prophet (and will keep them) as they used to be observed in his (i.e. the Prophet's) life-time, and I will dispose with it as Allah's Apostle used to do," Then 'Ali said, "I testify that None has the right to be worshipped but Allah, and that Muhammad is His Apostle," and added, "O Abu Bakr! We acknowledge your superiority." Then he (i.e. 'Ali) mentioned their own relationship to Allah's Apostle and their right so Abu Bakr replied: "By Allah in Whose Hands my life is. I love to do good to the relatives of Allah's Apostle rather than to my own relatives" Abu Bakr added: Look at Muhammad through his family (i.e. if you are no good to his family you are not good to him).
[Sahih al Bukhari]
What happened was that Fatima (ra) was saddened and one narration said "angry" and she did not dispute with Caliph Abu Bakr (ra) once the truth was revealed to her, she left but the Caliph felt bad so he went to Ali's (ra) house later:
“When Fatima became ill, Abu Bakr came to her and asked for permission to enter. So Ali said, ‘O Fatima, this is Abu Bakr asking for permission to enter.’ She answerd, ‘Do you want me to give him permission?’ He said, ‘Yes.’ So she allowed him (to enter), and he came in seeking her pleasure, so he told her: ‘By Allah, I only left my home and property and my family seeking the pleasure of Allah and His Messenger and you, O Ahlel Bayt.’ So he talked to her until she was pleased with him.” (Sunan Al-Bayhaqi)
This Hadith is narrated by Bayhaqi in al Sunan al Kubra (6:300-301) and Dala’il al-Nubuwwa (7:273-281) who said: “It is narrated with a good (hasan) chain.” Muhibb al Din al-Tabari cited it in al Riyad Al Nadira (2:96-97 #534) and Dhahabi in the Siyar (Ibid). Ibn Kathir states it as Sahih in his Al Bidayah and Ibn Hajar in his Fath Al Bari.